Learning some tricks of the trade will boost your confidence.
You've got to be in it to win it. If you don't go to the party, you won't get an opportunity to dance. If you don't go to the meeting, you may miss an opportunity to network with other people. The truth is, showing up is half of the battle. If you don't go, you'll never know.
People are often terrible when it comes to deadlines. If we are ahead, we'll often slow down to allow the task to fit the allotted time. If you can get it done quickly, do so. Don't dawdle if you don't have to.