When seams get too bulky, i clip the seams in the middle--especially useful for flying geese. i got this tip from Carrie Nelson's blog (or book?) of Miss Rosie Quilt Company fame. you need really sharp tips for this--i use Fiskars scissors that has the micro-tip (see below for a photo of the scissors). Carrie says it hasn't affected her quilts and so far so good for me as well.