If you can't afford an x-keys, use the numpad area of your keyboard. Not sure how well this works with games other than wow, but anything on the numpad can either be easily moved or forgotten.

I currently have my arrow keys for moving all four of my warlocks, and have wasd for single movement, but am thinking of getting rid of the arrow keys for movement since it is rarely useful and doesn't work all that great due to desync anyway.