Share 'First Marathon; Got Tips?'

So, I'm training for my first Full. I've done several Halves and I have run up to a 30K race. I'm ready to run my first full and I want to qualify for Boston on my first go around. While I'm not elite or anything my Half time is 1:30-1:35, so I know I can make the 3:10 limit given I put in the workouts. What I want to know is what tips you might have for doing my first complete marathon. I've se…