I've volunteered at my local humane society for about a year and a half and I work only with the cats. I've seen some of the stupidest reasons that people have given up their cats.
-Did not meet expectations (Saw this as a reason for surrendering a turtle once too)
-Aggressive towards children...
I usually record my cats when they are being cute, then go through and take 'screen shots' of their cutest moments. (I do this all on my phone) My avatar picture was captured using this method. Love the tips though! I'm definitely going to try some of them! :)
You'd think that with the bazillion pictures I take of my kitty that I'd have more of him yawning, but this is the best one I was able to snag off of my Facebook. This is Felex!