I have been debating for a while about posting some of my own sayings and credos (besides the St. Patrick's one). The main thing is that, when I put them into words and look at them objectively, a lot of them are probably pretty lousy advice. So take everything below with several grains of salt.
"Don't think of your successes, only of your failures."
"Never focus on how far you have come, only on how far you still have to go."
"Absolute total perfection is the MINIMUM acceptable level."
"Every person must be prepared to take the whole weight of the world on their shoulders, ALL ALONE."
"You, and ONLY you, are responsible for everything that ever has gone, is going, or will go wrong with the world."
"The least you can do is EVERYTHING."
"You have NEVER done, nor suffered, enough; and never can."