I try to do 30 to 40 minutes of mild exercise (yoga, or indoor bicycle, or walking a couple of miles with ankle weights) every day, sometimes I skip one.
I used to go running for all the warm season 30/40 minutes a day (OK, probably you wouldn't call what I do "running", but still it was at least 3 miles), but now with two herniated disks and a half it's not recommended.
I am going to try kayaking next month, last week i tried a weird dance-like thing called "contact improvisation".
For my health I should become very very fit, but it's not easy to sacrifice other things for me more interesting for physical exercise (can't do exercise and a day of work together, for example), so I've been dragging my feet.