Plan my next day the evening/night before. Planning takes too much mental energy, therefore just plan the day before, and in the morning, i just have to do, not decide. With time, i became better at what to plan also.
When some task has been avoided for a long time, plan & tackle it the first thing in the morning. Willpower & brain power is high, just start & do it for at least 20 mins - 1hr. It reduces the unconscious mental anxiety build up due to avoidance. Becomes easier doing that task in the future.
Some methods which help me: