(Of course thoughts must be supported by consistent action, but this month's tip will focus just on the thoughts.)
Don't listen to anyone who says fear of public speaking is 'just in the mind' - the results are real, often with distressing physical symptoms. But because it does begin in the mind (like all our fears) that's where we find the solution.
Who's running your presentation? You or PowerPoint?
PowerPoint is the greatest gift and curse of modern presentations.