Alt+1-3- Commanding shout, Warstomp, Health potion /stone (respectively)
SB - Mouse button 4
CB - Mouse button 5
Cleave - Mouse scroll up
HS - Mouse scroll down (on fight such as patchwerk where rage is a non-issue I will take off the scroll resistance, so i can basically fling my finger downwards and HS will be tabbed for the next 5 minutes)
F1-8 - Marks
Enraged Regeneration - L1 (homepage button)
Shieldwall - L2 (mail)
Last stand - L3 (music)
Dodge trinket - L4 (copy)
I wouldn't necessarily agree with Criss about the baby steps: I re-bound everything in one go and then did low-level instances a few times and I seemed to pick it up quite quickly. But that's really up to you.
It's probably a personal quirk, then. In all things I do, game, work, or hobby, I tend to get too dependent on what I'm what's familiar, thus making ANY habits hard for me to break. Even once I started playing alts and couldn't do anything else but use keybinds, once I got on my tank, I was too used to my rotation as a clicker, so I ended up doing this sort of inefficient half-click, half-keybind, mostly confused sort of thing, haha.