Efficient mounting . Use PowerPoint or similar drawing program to make one or more panels. Laminated paper and Velcro dots are better than card and pins. Group related panels, or link with colored tape on the board. Make them even better by presenting them well.
Posters can be better than slides.
The atmosphere is more relaxed. And as a viewer you can skip posters on uninteresting topics, but you have to sit through a boring talk. Here's my advice on how to make your poster effective. Most of it is obvious, but some is new and may surprise you. All data shown in this poster are fictitious.