After drying off, I immediately put on clothes for comfort. Usually pajama pants and a t-shirt.
Then I go into my room, turn on the tv very low for noise, and check out my websites. The key there is the quiet. I put the closed captions on my tv so I can have the volume low and follow it by reading rather than my hearing it.
I also have a few hobbies. Most of them now involve the internet and checking websites. One hobby of mine is to do research on various subjects on wikipedia or to browse through TVtropes.
I also play video games when I get the free time and the inclination to do so. I also try to carry some kind of book with me to read, such as when I'm in my "library," or when I go out to town and eat by myself I'll carry it so I can read it as I wait for my food.
One thing that you might want to consider to de-stress is, if you can, to take a regular bubble bath. Go to Bed, Bath, and Beyond, pick up some bath beads or bath crystals (or whatever they use nowadays), prepare the bubble bath, and have a good long soak. Getting some candles that have the same scent as the bubble bath and having them lit while the lights are off is optional but recommended.
Slip in, take a deep breath in, let it out slow, and relax for a minimum of half-an-hour.
If you find it difficult to "let your mind go" while it has nothing to do as you just sit there, then consider getting an mp3 player. You can either go the hippy route and play new age music, natural sounds (the sounds of rain, or natural forest sounds, for instance). If that's too passive and "boring" then instead you can download audiobooks and let your mind listen to those as you lay in the tub and relax. The only caveat is that it can't be anything political, or any other subject that may point out all the things that invokes negative feelings in you. Rather, consider listening to something positive, or more neutral. Educational audiobooks that helps you learn something new, or poetry that helps to invoke the emotions you're wanting to feel while relaxing. This is a luxury that I recommend doing at least once a week.
Another thing that you might want to consider doing with your family is to have a "household quiet time." I know every family is different, but just having the noise of other people in the same close space around on a constant basis can inherently cause stress. Our brains weren't designed to take in stimulation on a constant basis.
Therefore, try to get see if you can get the rest of your family to follow some kind of "quiet time" rule. By this, I mean have a certain portion of the day in which the tv and the stereos are turned down low or even turned off altogether. Decrease the noise and stimulation level in the whole house. Maybe do this for the whole house for about an hour in the afternoon before letting it come back up. People need stimulation of their senses, but people also need rest from stimulation too. Maybe try to do this once a day, but it may be difficult since it requires cooperation from the rest of your family, but there's no harm in asking.
Take out some time in the day *just* for you, where you can relax and be alone by yourself. I think one of the biggest sources of stress for a person is other people. So I limit how much I talk to other people. I have some friends I call on the phone just to talk and shoot the ****, but that's only like 5 people. I don't generally talk to anyone else. That way, I avoid getting caught up in other people's drama. So if you're getting caught up in other people's drama, try to take yourself out of it. Let people vent to you, but don't get involved. I don't know if that's really an issue with you or not, but it's a good way to avoid stress you don't need anyways.
Lower your activity load. I don't know how much you do every day, but you may be trying to do too much. So cut down the number of things you're trying to get done every day. This may include hobbies.
I heard this great thing on a radio show about vacations. They talked about how people live busy day-to-day lives rushing all over the place for work, and then when they go on vacation they try to cram in all the things they want to do for fun in those few days, and when it's over they get back to the daily rush. I don't do that. When I go on vacation, I don't make any plans. I just go somewhere far away and look things over and take my time. I have some family who lives in a big city and I will go and stay with them some weekends. They will go out and meet with their friends late at night, but I'll usually stay in their place and just lay on their couch and watch their tv and relax that way. Sometimes it irks them that I don't go out with them so much, but I want to relax, so it's fine with me.
So I guess what I'm saying is is that just because you go out and have fun doesn't mean that you're going out and relaxing. Fun activities can be just as stressful as working. And while it may be boring to sit and do nothing, it gives your body and mind a chance to relax and rest, and do so with a minimum expenditure of energy or intake of stimulation.
And if you aren't having that much fun, then try to give your kids more responsibilities around the house. I don't know if you have, but teach them how to use the washer, the dryer, and how to cook. And let them use those skills for the rest of the house. Every household responsibility you give to them is one less household responsibility you have to deal with. And that will help you to de-stress while giving your kids necessary household skills.
Another good way to de-stress is to learn to vent. You might feel angry or frustrated or some similar negative emotion, but you are rational enough to know that you can't really do anything about the issue that's making you feel that way. Even so, it's important to let those emotions out, to vent them.
A lot of people go to a counselor for this. They aren't crazy - they just need to let out a bunch of stuff confidentially that they can't let out to their friends or family. That might cost a bit too much, so another alternative is to write in a journal or even a blog all the stuff that irks you and making you feel those negative emotions that adds to your stress. That way, you can vent and let it out instead of keeping it inside. An option tangential to that is to write some kind of fictional story that relates to the things that irk you. Or try your hand at poetry, or songwriting. That can help you vent as well.
Those are all the things I can think of to generally de-stress. I hope these are useful ideas for you.