I use Reptile Scan (http://reptilescan.com/) for my collection and record nearly everything. I love objective information, so I keep track of way more things that I will likely ever need. Sheds, defecations, empty weights, meals (including gram weight), breeding season temp drops, pairings, locks, ovulations, lay dates, hatch dates, hatch weight, etc - I've got them all for every single animal I've ever kept. Sure it takes an extra minute or two to do, but it's part of my routine and I wouldn't do it any differently.
that's awesome. i love objective data, too; it's just so fun to try and find trends. i'm a designer so i plan to collect my data and maybe make some cool charts or graphs, just for fun.