Success comes in cans, not can'ts.
Describe your product in terms of what it does not in terms of what it is.
Don't be reluctant to give of yourself generously, it's the mark of caring and compassion and personal greatness.
Luck is predictable; the harder you work, the luckier you get.
Resolve in advance to persist until you succeed, no matter what the difficulty.
Whatever job you take on, make yourself valuable, then indispensable.