Garr Reynolds, Presentation Zen, has created a page with Presentation Tips on his own site. The tips are three main areas: Organization and Preparation, Delivery and Slides. There are also Samples and Tutorials.
Olivia Mitchell at Speaking about Presenting has created a collection of her Best Posts to help you with every aspect of your next presentation.
Presentation Skills has tips around
• Planning and writing the presentation
• Using visual aids effectively
• Overcoming presentation nerves
• Delivering the presentation confidently
• Answering questions competently