Take time to practice your presentation many times before using it in a real live sales situation. You should know your presentation backwards and forwards, word for word. Never take notes to a sales presentation and refer to or read from them. That is so unprofessional. Customize your presentation for each individual prospect. One of the worst things you can do is give a presentation that appears to the prospect has been given to every other person you sell to.

Make sure you build rapport, and qualified the prospect thoroughly before you dive in to your presentation. People purchase from people they like and trust, so spend adequate time on rapport building. The same goes for qualifying. Make sure you're clear as to what the prospects problem is before presenting your product or service as the solution. The problems you uncover will determine how you customize your presentation and how your product or service solves their problems.