Here's one of the better pictures I found with colour coding to show good keybind spots and which fingers to use:
Mind you, this one recommends removing left/right turning keys and rebinding straife to where they were (to A D), which def takes some practice to use effectively.
http://wiki.eternal-wow.com/index.php/Keybinds is the page it's from, it gives a bit more information.
You want your longer CDs to be bound in easy to reach places, but not somewhere you may bump accidentally. I tend to use CTRL modifiers for big CDs I don't want to press accidentally, just because it's easy for me to reach. Function keys are good for long CDs too because you're very unlikely to press them accidentally. But I'm by no means a poster-child for good keybinds. Feral isn't very heavy on melee moves, just a lot of functional moves and cooldowns to bind. I tend to function on an "if it's not broke, don't fix it" mentality.
People tend to recommend T for movement abilities, so you could bind monk roll to it, and ALT + T for flying serpent kick, or something like that.
I like F for time sensitive healing moves, or a defensive CD would work nicely too.
It's really best to try out different keybinds for different moves, like anything easily reachable with your index finger: T R G F C V, and keep a consistent theme with all your characters.
This guide is from joystick:
"The green keys should be abilities you use all the time, the ones you need to get to a lot. The pink should be used for key cooldowns or short cooldowns. These can either be ones that you use regularly or ones you'll need to get to in a hurry when you do need them -- say, when the proverbial's really hitting the fan, perhaps a paladin bubble, a mage Ice Block or Cold Snap, or a shaman or druid Nature's Swiftness.
Move on to the purple keys. These can overlap with the pink keys, but I would recommend prioritizing the pinks for cooldowns you really need to get to in a big hurry. Offensive cooldowns could be great for the purples, as they are perhaps not so crucial to survival.
The turquoise keys could be used for abilities that have long cooldowns, like a priest Hymn of Hope or Shadowfiend, or ones that aren't used often or can't be used in combat -- the ones that you still want to have on your bars."
http://wow.joystiq.com/2012/05/22/keys-to-pvp-keybinding-movement-and-clicking/