To be the best, learn from the best
Change is a sheep in wolf's clothing
The audience wants you present, not perfect.
If your short-term goals are too high, you may give up too soon. If your long-term goals are too low, they may not give you enough enthusiasm to drive you over the bumps in the road along the way.
Stage time, stage time, stage time.
The biggest mistake made by emerging speakers is that they discount their own experience.