Presentation (35mm transparencies) -
In Power Point just check slides in computer.

Having spent all that time preapring the talk itself, there are still a few things you can do at the last minute which will help ensure a successful presentation. Or, if you are the nervous type, help fill time . . .

Before the day begins, or last thing the night before, run through your talk once more. Use a mirror or visualize standing in front of an audience as you practice. If you've brought a slide carousel with you (a good idea), check their arrangement. You probably won't have time to do this later.

If possible, take a tour the room you'll use for the presentation early in the day.
If you need specialized equipment, make sure it is available.

Check to see that your slides are oriented properly in the carousel.

Make sure the focus switch works, and determine who will be controlling the slide advance. Do the slide advance, reverse, and focus features all work? It's your show, so ask for help with the equipment if you need it; it's better to ask for help then fumble around during the presentation. Determine who will be controlling equipment for you.

If the room is large, or your voice small, use a microphone. Try it out before the audience arrives (blowing into the mike or counting '1-2-3' is tacky, so don't do it).
Check to see that accessories are present; chalk, eraser, markers, and especially a pointer. If it is a laser pointer, does it have batteries loaded?

Avoid standing behind a lectern or desk during the presentation. Stand to one side of the projection screen or blackboard, and closer to the audience if possible.
Don't be afraid to insist on a few minutes to yourself prior to the talk; 15 to 30 minutes is standard. If you have an itinerary, check to see that you've had time allotted for preparation. If you are running behind, see if someone is willing to meet with you after the talk, then us ethat time to prepare. Use this time to double-check your materials, and your introductory and summary statements. Don't allow yourself to be distracted by audience members coming up to chat.

Don't wait until the very last minute to make that run to the bathroom, and remember to check carefully your appearance, including zippers, buttons and other closures, before you reappear.