You can ride fast but never in a hurry.
Give yourself a chance to wake up before you go riding. Especially true if you're at a rally and have had a few too many (Nothing wrong with that!)
When in doubt - Stop.
Watch out for what your body is telling you. If thirsty - drink. If you need to go - find a restroom (tree, ditch etc) but go.
Never ride tired.
If you need to stop then do it.
And finally Mother Nature wins everytime.