They go into the slide holder upside down. Check out the controls for the lights and projector before your session starts. Check the microphone is working by tapping it. Make sure you know how to use the laser or light pointer. Light pointers often need focusing.
Delivery Try to relax.
Don't read out the title, especially if the chair has just done so. People can read it. The chair will have done that already. Get on with your talk. Most people turn right off when a paper is read verbatim.