Mindfulness meditation is great. Best of all, it's cheap! You don't have to go to all those crazy classes unless you like socializing with people who mindfully meditate. They're great, but you can hang with other people who are just as nice for free.
Here's how to do it:
1. Find a reasonably quiet place for about as long as you need to meditate.
2. Get in a nice, comfortable position to meditate in either sitting or lying down. It's best if you can keep your spine straight. Yes, the full lotus is the best position. But a kitchen chair or pillow will suffice. And are better if you're not flexible or have a bad back.
3. Close your eyes and focus on what's going on right now, in your body, in your breath. Take deep but not strenuous breaths.
4. Still your mind and hold this position for five minutes to start and work your way up to an hour.
5. Your mind, of course, will wander off immediately.
6. Don't abuse yourself because your mind wanders off or what it wanders off to. Just gently reign it in. That is the key to success in mindfulness meditation: just gently reigning in your wandering mind over and over again. It may take decades to stay completely focused for a full hour. But you will reap the rewards anyway.
7. If you fall asleep, you probably need the rest more than the meditation.
You can also meditate in your daily life by focusing all your attention on what you're doing right then and there and holding that attention to it no matter what. This is a wonderful meditation while driving a car or bicycling.
Of course, if this is not enough, there's a trillion books and a million free web sites that can help.