The last ten percent is the signal we look for, the way we communicate care and expertise and professionalism. If all you’re doing is the standard amount, all you’re going to get is the standard compensation. The hard part is the last ten percent, sure, or even the last one percent, but it’s the hard part because everyone is busy doing the easy part already.
The secret is to seek out the work that most people believe isn’t worth the effort. That’s what you get paid for.