Love it! Lots of good info.... I'll try not to repeat any. I'm a card swapper and currently only 4 working cameras. About 7 that are pushing daisies.
Physically number your cards and cams. Helps sort out problems.
A folder system in computer (by year, month, cam location) to organize the pix
Make sure the date is right. (I hate myself when i look at old ones and see Jan 3rd and have to figure out when it really was)
Have a foolproof way to make sure there is a card in cam and cam in ON
If there isnt a tree where you want the cam should be, hammer a stick in the ground
New lithiums every spring
Buy one new cam a year (Seems to keep me around 4 or 5 working) (It's now a standing item on my Christmas list, my mother-in-law is awesome)
My preferred direction to face is North then south (like Sniggle said)