Be black or white with no shades of gray. In other words, don't be a nagging mother.
Don't let anybody's opinion kill your belief in yourself.
Always be humble enough to learn something new. Otherwise, it's only a matter of time before your knowledge becomes outdated.
Average talent, plus hard work and dedication, will always beat talent by itself.
Sometimes you have to go through some ugly stuff to get to the good stuff.
To change your horse you must first change yourself!