I've been clicker training Kona (now 3 years plus) since he was about five months old. In *his* opinion, the day is not a good one unless it involves "training time."
His "tricks" to date include 'high five' paw presentation, handshake, sit, stay, lie down, roll over (two directions now), touch (two paws on object taller than he), "give me a kiss" (his nose on my cheek), sit pretty (sitting perched up tall on back legs) and wave (must be three waves of paw or it doesn't count!). He also jumps up on command and through a small hoop I found at the 99-Cent Store. We make "hurdles" by tipping chairs over on their sides and he runs a course involving three such hurdles and ending up on a high stool. Unfortunately, I have been *totally* unable to keep him from cruising kitchen counters...sigh...
We've found is just a happier cat--and more settled--when he has his training. We also believe that the wild kitten stage was mitigated somewhat with the clicker training--he's such a *smart* cat that I think working his mind to figure out the "behaviors" we set out for him truly helped to calm him and focus his actions in a more positive way (not that we didn't have several blips along the way!). While the initial food feedback (we use dehydrated chicken:
http://www.amazon.com/PureBites-Chicken ... 96WD5MQDKX) was what Kona wanted, it quickly evolved into just enjoying the one-on-one attention from me and the chance to work his mind in a different way.
If you're even *thinking* of clicker training, I'd suggest this Yahoo group:
https://groups.yahoo.com/neo/groups/cat-clicker/info It's filled with folks who clicker train for various reasons (fun, agility coursework, socialization of shelter cats) and they have lots of folks who post regularly with very practical tips. There are also a series of documents on different behaviors, the science behind clicker training and training pitfalls to watch for.