I know this is broad, but at what point do you install an additional ESX host? The types of projects we do I never know at a budget cycle if to add 5 or 50 servers... it really depends on who has a "wild hair".
I guess I'm looking for your thoughts on usage information. Say we hit 80% utilization its time to expand... storage, I know this varies based on what you keep, but should we expand the San at 70%? Really, just give your thoughts on the subject. No right or wrong answers.