This is a real problem. When people get bored they tend to start hyper-focusing on symptoms and end up feeling worse. A few things my daughter tried (totally lame I realize but when you're bored you're desperate for entertainment):

books on tape (you can download straight to I-Pod from many libraries)

Yoga (under careful, guided instruction - beginning class)

teaching the dog new tricks

some crafy stuff (candle making under supervision of course in case you forget what you're doing, jewelry making, weaving)

helping in the garden

bubbles (I know this one sounds really stupid, but she loved bubbles as a little girl and she found all kinds of interesting ways to make new, big bubbles)

She did a very slow return to exercise that took up some time every day. This one needs to be done under your doctor's supervision of course

journaling

If TV doesn't bother you stick with calm, real-people shows (i.e. no Spongebob). And don't watch commercials. Commercials are crazy full of flashing lights and too quickly moving images. You might check out the library for a DVD set of a TV series you enjoy (like Lost or House).

Best of luck to you-