The Dojo or training hall is a sacred place and must be treated as such. Below are videos about some of the basic aspects of this. Your Belt (Obi) and your Uniform (Gi) is part of your training and should be treated as such. There is a certain way to tie your belt and fold your Gi and these are detailed below. With the Jacket, Left side (side with the label) goes over the right side.
Dojo and Uniform Etiquette Kevin Kennedy