advice
Perhaps the most important piece of advice is to trust your own instincts.
This is one piece of advice that I'm more than happy to follow.
It was one of the best pieces of advice my mother ever gave me.

SMART Vocabulary: related words and phrases

Giving advice
advice column
advice columnist
advisability
advisable
advise against doing something
agony uncle
brain trust
clinic
consultant
GDA
guidance
Monday-morning quarterbackidiom
oracle
pick someone's brainsidiom
preach
Privy Councillor
run over/through something
shoe
SpAd
take someone's advice