Good info above.
Another thing is to be sure to have your quilt basted REALLY well. I use 505 and it holds everything together through all the squishing and turning that I have to do to get all that material under my needle.
Another thing I learned is that, when you get near the boarders, be sure you have the fabric flat underneath and you aren't sewing your fabric edges together as you sew your borders. (BTDT) Really flatten everything outaround the edges before you begin.
I also use the puddle technique, starting in the middle and working outwards.
Good luck!
Watson