Practice setting the equipment up several times - Spend some time making sure you know how to properly set up the LCD projector with your computer and other computers. Set up the LCD projector in the actual presentation environment you will be using, if possible. Set up well in advance - Allow yourself plenty of time to set up your computer and the LCD projector. Check any last minute details. Check the LCD projector bulb life - LCD projector bulbs do have limited life.
Some bulbs have shorter lives than others.
Check and make sure the bulb you will be using is not close to the end of its life. Always carry spare bulbs with you and make sure your know how to properly change the bulb. Practice changing the bulb during one of your practice sessions. Some colors and color combinations do not project well. Nothing is more frustrating to an audience than text that cannot be easily seen or read.