I plan to get a larger fish tank and am looking for information?

My largest tank is a 55 gallon - I want a 100 gallon or larger freshwater tank as my next one (so addictive!) but want to make sure I know what I am doing before I begin. Things I have no knowledge of - overflow - canister filters - protein skimmers - and well, anything else that I don't need with my 55 and smaller tanks. Please provide any information you have and links if possible.