1. Be yourself (You have to know you and what you want)
2. Take the time to get to know if he really is the right one.
3. Never separate your mind from your heart when making decisions.
Contrary to what is often said (not all men are the same).
Whatever our experiences have been in relationships we must keep in mind that WE select our own friends, lovers, and spouses. Hopefully with time we gain enough wisdom to make better selections. Ultimately you want to find someone who wants the same things you want.
You don't want to pull a "bait and switch" prentending to be someone you're not because you believe that is what a guy is looking for. Eventually you will revert back to your natural self anyway. It's not uncommon to hear someone say,
"She/He is not the same person I fell in love with."
Be yourself and hopefully you'll find a guy who loves you for you.