Rear Windshield installation

I am going to be installing my rear windshield this weekend or tomorrow just as soon as I can. I have the glass and just got the gasket today, is there anything else I should get before attempting it? When I removed it I just cut the gasket and lifted the glass out to sand and primer car but now that I don't have it in a shop anymore I have to get that glass in. Tips and Tricks wanted also, I've never installed any glass besides door glass. Was gonna take it to a shop but one company wanted $160 even with me supplying the gasket.