I had the EXACT same problem. And it took me awhile to figure out a solution. In the process of designing a one-at-a-time approach to GTD on the mac called "Ready-Set-Do!" I would get tons of "@Errands:" items. And it began to clog up my Actionable folder on my desktop.

The Solution?? --> I made a separate text file called "PURCHASE LIST" with a list of all of the items I would like to purchase divided by category (e.g. Personal, House, Living Room, Office, etc.). And I keep this list in my "Checklists" folder which gets reviewed once per week with my weekly review. During that review I go through each category and bring things to the top of each category based upon which item is the most important for that category. Or sometimes I bring this list with me for the "business meeting" my wife and I have once a month and we discuss our purchasing priorities. The only @Errands items that go in my Actionable folder to actually purchase are the "must haves" that my wife and I have committed to purchasing (in the format of "@ Errands (Office Store):...")Everything else starts on the Purchase List.

In addition, since I keep this Purchase List on my computer, I also have a physical folder I keep in my REFERENCE files called "Purchase List Support" -- and any magazine pages, or pictures or things related to potential purchases goes into that folder corresponding to items listed on the Purchase List I keep on my computer.

So far this is really working well for me. Give it a shot and see if it helps at all.

Sincerely,

Todd V