Always bear in mind that your own resolution to succeed is more important than any other.
We all know our own head trash is our worst enemy. So why do we allow it? If only I had the answer to that one. I think that playing it safe and talking yourself out of something can be easier in some ways than biting the bullet and just working toward whatever it is you want to accomplish. It most cases there is a way to figure anything out if you just spend enough time looking at all the angles. It may not be easy or readily apparent but it is usually there. Don;t give in to your doubt. You can achieve anything you set your mind to.