The ceremony is kinda the most important part…I mean you rehearse it and everything!  Make sure you actually play the music during the rehearsal so you can get the cadence down of people walking down the aisle and when.  When walking down the aisle if you have child flower girl, etc…wait to walk…they go infinitely slower than the rest of the bridal party.  Also it makes sure you’ve figured out what songs will play and when…trust me, your DJ will thank you if you have this all figured out ahead of time!