If you're presenting overseas, be sure to take along power converter adapters , as many laptops can't connect to the local AC.
The presentation room may or may not have an LCD projector available. If you've used the provided projector before, or you know that there will be equipment you can use, you can pass on this tip. However, always take an assortment of video cables (more on that below). Your company may have a projector that you can take on your travels -- a good solution, as you can practice with it before you go. Don't forget to bring along a replacement bulb for the unit. But be sure you have a thick, padded travel case for it as this equipment is expensive and fragile. And don't check a projector, unless it's in an Anvil case ; otherwise, carry it on with your laptop. If you need to provide your own projector, you might be able to find a company that rents equipment nearby. NetworkAV.com or Meeting Tomorrow can help you locate AV equipment rental companies in the area that can provide what you need. Try to get the projector on-site or to your hotel well before the event, so you have time to practice with it. Alternately, the space might offer a widescreen digital TV monitor for presentations. These are quickly replacing projectors as the best way to view computer graphics, as the contrast and viewability is much finer. Many widescreen TV vendors have wall mount units that have S-video or composite video inputs. Try to obtain the make and model of the one you'll be using before you leave, so you can be sure you have the right cables and adapters.