I have a question for you guys. When I go to my LYS I always end up seeing some great yarn that I just have to buy. I always buy about 6 hanks (600 yards)- but I usually don't have a project in mind - it goes in the stash for a later date. When I finally pull it out I end up making a scarf which uses up most of the 6 hanks. I made so many scarfs last year - I want to start making sweaters this year. Should I be buying a standard amount of yardage for a sweater when I get the urge to splurge on a new and wonderful yarn? How do you guys buy when you don't have a specific project in mind?