i try to get 2 yards of a favorite fabric.
keep blenders in mind..(neutrals,tone on tone)
"Blenders are quilting prints with an abstract, tone-on-tone or washed appearance that help blend the different components of the quilt together"
sample pictures:
http://www.fabric.com/quilting-fabri...-by-color.aspx
White or WOW(white on white)
it really is what your pocketbook will allow. use coupons,look for sales. use freecycle,craigs list garage and estate sales.