Upon first arriving in a quilt or fabric store, I go the sale rack first and find anything I like, then see what percent is taken off. Sometimes if you finish a bolt, you get even more off. If I really like the fabric and the bolt has little on it with the deal, I finish it off.
Then, I go to the sections/colors that hold the collections I have that I build on. Examples of this for me are: Butterflies, Daisies, Black/White and Black/red/whites
I always hit the brights because I love doing bright quilts. Then, I peruse the fat quarters for any that I absolutely cannot live without for my charm quilts.
You just HAD TO ASK... didn't you?