Coming prepared

I've been thinking a lot about what Burroughs says about preparing for worship and prayer. Most of the time, I head into chapel, church, and Bible studies without at all thinking about them until I get there. I expect them to change me. While this is true, if I really expect to give to God, I should consider preparing myself so that I will be in the best condition to give Him an offering. How awesome it would be if the first 15 minutes of chapel weren't just me trying to get my heart right while I sing, but that I went straight into singing without having anything else on my mind but praising God and encouraging my brothers and sisters?