I think what I would say to my younger self, and probably to younger, just starting-out writers is that a lot of times you're just afraid to put yourself out there, and it's uncomfortable because it's working up the courage to do something, to push yourself to do those things.
A good novel doesn't just transcend the boundaries of its target market - it knows nothing about target markets.
Beware of men who cry. It's true that men who cry are sensitive to and in touch with feelings, but the only feelings they tend to be sensitive to and in touch with are their own.