I figured I could offer some tips for girls too to go along with the post for boys. Some of these might be more in the context of a relationship, but I hope they will be encouraging anyway.
1. "Above all else, guard your heart for it is the wellspring of life" (Prov 4:23). This is so hard, but so important!
2. Don't make assumptions or try to figure out a guys intentions. Treat them all as your brother in Christ. They don't think about things like we do so don't try to read into his actions. As hard as it is, try your best to go by what he says and not what he does. If he doesn't tell you he has "feeling" then treat him as if he doesn't.
3. Be a lady and allow guys to treat you like one. In fact, I'd like to say demand it but some guys would never get the clue. I know we are all capable of opening doors but allow him the privledge of doing it for you.
4. Don't try to be "one of the guys." God has created us differently and that's a blessing! I also might add here, that if you don't feel ready for a serious relationship, then spend your time and energy by investing in relationships with other great women you can learn from.
5. Let him initiate the relationship and the level of intimacy in the relationship. While it's good to share things, be careful about trying to make the relationship more intimate by sharing things with him (this goes for non-defined as well as defined relationships).
6. Be responsive to his actions. Our relationships are to mirror that of Christ to the Church. As Christ lavishes His love on us, we respond to Him with praise. Lately I've been trying to determine what I can do in my relationship. I came to the conclusion that as a single, it's much easier to be a guy. If you like a girl you can ask her out. You don't have to go through the "wondering stage," and countless other advantages to being a male. But then I decided that within a relationship, the guy has the hard end of the deal. For both sexes, as singles we have to learn to be submissive to God. Boy, is that incredibly tough! Then as women in a relationship we have to learn to do that with the man too. Well, if we get good at being submissive to God, that shouldn't be as hard as it would be if we weren't allowing Christ to rule our life. Well, the guy in a relationship still has to submit to God's authority and allow Him to lead, but he also has to be a leader and initiator! Guys, I'm praying for you! That must be incredibly tough! And then I can think of all kinds of things guys can do to "woo" their lady properly, but what do we do? Just sit and wait? So as I was pondering a list for girls, I realized that this (#6) is something I can do. I have an incredible guy and I want to be sure he knows that. :)