Advice on first kiss?

so i have a boyfriend that ive been with for a little over a week now, and we liked each other before that. This is my first real boyfriend (a couple of others were just technical) and ive never kissed anyone. He says he hasn't either. Over the phone we've made it clear we would kiss each other, and we joke that if the packers win the superbowl he'll kiss me, and if the stealers win i kiss him. I'm going to see him tonight at church (we'll sit alone, though) tonight, and it's very possible he would do it tonight. so any advice on what to do? i mean to get to that part. thanks =)