The only way you will be productive today is if you plan. Use Father Time to your advantage. Take a good solid assessment of what you need to get done and how much time you have to do it. Do the math and get on the ball. Slow and steady wins the race today so keep this in mind. Try to refrain from getting to scattered. Dispersing your energy will prove to be fatal. Consolidate and conquer.
Leave your doubts in the past and look forward to a brighter future.