A good technique is to go cold turkey for a month. Then go back in a month later and pick up what you feel like off the rack. Anything that you really really like you'll make the effort to get the back issue but the key is that you'll get out of the habit.

Another idea is to go cold turkey and transition into wait for trade which will stop much of the buying out of habit.

"I want to see beautiful people doing amazing things." - Grant Morrison