Think big. Start small.
The best way to be missed when you're gone is to stand for something when you're here.
If you don't like your definition of 'good enough', then feel free to change that, but the goal before shipping is merely that. Not perfect.
Many people believe that great designers get great clients. It's the other way around.
If you think your organization needs a bigger marketing budget, maybe you just need to be less average instead.
Leadership, on the other hand, is about creating change you believe in.