I strongly believe that "perfectionism" is the most deadly way of procrastinate.

The cure is two sided, first you must work with acceptance of your inner resistance/monkey mind - books like the war of art, the dip and do the work can help you here.

Secondly you must work on shipping your product/code/content often and full of errors, this will help you accept that not perfect is okay - my biggest inspiration for this is Seth Godin's blog.

I can also reccomend the letting go book from http://zenhabits.net/lg