Get busy documenting.
My Sony CyberShot camera cost me $89 at Buy.Com. I had to then buy an SD card for it, and it's probably given me 1000 pics on the two AA lithium batteries that I got for it. (Trust me: those overpriced lithiums are worth the money.)
It takes decent pictures, if the light is good enough. But the thing about it is that it has a pretty decent digital video feature. If you've bought a digital camera in the last two to four years, it probably has one, too, with sound.
Use that thing. Turn the switch over to video, and record your kids, and catch them talking. Record your father, talking. Get your mother telling you some bit of family lore, or have her talk you through her method of making your favorite dish. Then upload that to your computer, and back it up with off-site storage.
The "film" is free. The memories are priceless. I recently found audio of my 12 year-old, that I made on a then-new-fangled digital recorder in 2000. It brought tears to my eyes. I wish I'd had video then.
We all know an "Uncle Jimmy," if we're lucky, and you can record treasures like this one.
(No, I didn't record it, but I wish I had, and I thank the anonymous guy who took that vid of his Uncle telling a damned funny story.)
If you're my friend or family, and it's been bugging you that I've been sticking a camera in your face, don't worry. I'm not posting them anywhere; I'm just keeping memories for me.