I once read some advice on how to stop “shopping therapy” (~ buying stuff you don’t really need!). Keep a list on the fridge and add any “ooh, I must have that” stuff to the list. If you still want it in 30 days then get it.
For a lot if us, the problem is having too many ideas and wanting to do everything. TMI (http://www.tmiworld.com/tmi/site/Home/) advised always having a page for ideas in your Time Manager. Get ideas out of your head as soon as possible and review your list every now and then to see what grabs you.
This has resurfaced in Getting Things Done (GTD - http://www.gtdtimes.com/) as the “Someday/Maybe” list.
Try it yourself. At the very least you’ll keep a clear head, making way for new ideas to come along, and eliminating that heavy sense of too much to do - that stops you doing anything!
And you may find it helps you sift out and act on your best ideas.