When it comes to the printed deck, presentation is everything. Take your deck slides to a print shop and get them properly bound. This shows investors how serious you are, and means your deck will remain neat and ordered no matter how many people thumb through it.
We recommend steel binding, which is the professional standard. If you can not find a print shop with a steel binder, then spiral binding is the next best option. Avoid comb binding, which can fall apart and do not, under any circumstances, use a staple.