A trade-off

I need to exercise.

I am a bit overweight, and there are a few nasty diseases that run in my family.  This year I turn 50, and the biggest gift I can give to myself is to improve my health.  I have already started to eat better, and am making good, 'tho not perfect, progress on that front.
I know all the great reasons to exercise (here's a partial list), and I know that it IS possible to find an extra 1/2 to 1 hour a day if I really try.  Right now I spend too much time on the computer, and too much time watching TV.  WAY too much.  I love my TV shows, and I love my e-mail friends, and I love the blog world.  BUT, those things are sedentary.
So here's the trade-off: It's time to spend less time on my butt, and more time on my feet!

Are any of you on this same path?  Are you further ahead?  Would you like to join in?  Have you tried and failed/tried and succeeded? Do you find it ironic that I'm blogging about this (as opposed to just doing it?)

I'm not about to turn this into a fitness blog.  It's just a reflection of where I am on my journey...and I'm interested to know where you are on your journey!

Incidentally, if any of you have a story to share, involving slightly chubby, sedentary, 50-year-old women who have managed to get fit, I would really like to hear it.
Come to think of it, any motivational story will do.
Really, anything.
Help!