It's always too early to quit.
Expect problems and eat them for breakfast.
To be a good loser is to learn how to win.
If you're going through hell, keep going.
Be thine own palace, or the world's thy jail.
If you think you can do it, you can.
Always desire to learn something useful.
Well done is better than well said.
Leap, and the net will appear.
Be gentle to all and stern with yourself.
As far as my favorite sites, I do a lot of mundane stuff on line because I travel so much.