How to Give Talks When You’re Not a ‘Speaker’

I find a talk easier to prepare when it's about one thing I can explain from experience. Trying to cover an entire subject makes the slides longer and the point harder to find.

Start with the problem, show what you tried and leave room for what didn't work. Rehearse out loud; sentences that look fine on a slide can be awkward to say. I'd rather hear a useful, slightly nervous talk than a confident one with nothing specific in it.