How do you eat an elephant? One bite at a time! Break your task into small chunks that can be done in a short time and without too much effort.

Do you know how to do what you're supposed to be doing? If not, go back to your source and get clarification. Or maybe do a little research. Ask a friend or co-worker for ideas and suggestions.

Is it a matter of Perfectionism? Anything worth doing is worth doing well; but sometimes "good enough" is good enough.