Here is another favorite idea from the past year: 

Resolve to write down ten of the most fundamental changes you could make to your business without destroying it.  Once you’ve completed the task, try to make an objective and convincing argument why you shouldn’t make the change.  If there are one or two fundamental changes you can’t make a compelling argument against, give them a try.  (Via Report 103)

Here is last year’s resolution:

Look for space in your office where you can have a comfortable conversation with a client, partner, or staff member.  Having a white board or other brainstorming tool would be a big plus.  Make it a fun place to think.