(1) Less is more (2) PPT is rare (3) Apologies are none (4) Q&A is managed (5) Trees are saved (6) Actions are demanded (7) Time is respected.
is less a presenting issue and more a time management challenge. The more times you can rehearse the fewer the nerves. Practise enough and you can get those nerves to the perfect point: enough to keep you agile and quick thinking but not so much as to cause you to be distracted and forget points. How many times is enough? Only you can decide but certainly with new materials schedule three run-throughs and notice how significantly better you feel on 'take 3'. Never present live without rehearsal, however brilliant your notes.