Some ADC help?

I recently started using 'attack-move' after about 2 years of using normal right-click micromanagement for adc's. I've found that it is generally most useful when you pass a certain amount of attack speed or when exposed to an extended team fight. It can however be useful early game in some tight situations in jungle where vision is limited. Apart from being witness to some interesting situations that were not possible without 'attack-move' i have experienced some problems that I would I would like addressed.

• What key is recommended for attack move? a, x or shift, something else?
• What finger do I use for this key? I have trouble finding d and f for heal and flash.