Might as well post it in this thread, but another tip for new gainers is to not look at the scale often. It's going to be tempting to want to weigh yourself every day, but it's better to do it every few days instead. You fluctuate so much in water weight and whatnot that you can easily go from a few pounds up one day, to a few pounds down the next.
Make sure you do your weighing in a consistent manner too. If you weigh yourself with no clothes and completely empty in the morning on one day, then do that exact same thing at the same time the next time.
I know this all seems like obvious stuff, but I've seen a lot of gainers getting discouraged over false information from this kind of stuff.