All the preparation in the world will not save you from unpleasant stress if something goes wrong with your set-up for a presentation and you’re running out of time. I strongly suggest one or both of the following:
1. Give yourself an “additional time cushion” of 30 minutes for traffic/set-up.
2. Where possible have your own helper to assist with logistical problems.
Eight times out of ten any assistance supplied by the venue is either clueless, has no perception of your time constraints or both.
These two little tips could save your sanity one day important day.