I'd back up most of what JohnM says except of add don't use google sky maps on your phone during an observing session, it will kill your night vision.
And further add:
Plan your observing session in advance. Write it down and use a red torch t to read it if you forget (red doesn't kill your night vision)
Make sure your telescope has been outside about an hour when you start to observer. Then everything is the correct temperature, and there shouldn't be any condensation blocking your view.
Don't always look directly at faint objects like nebulae. Your peripheral vision is more light sensitive. This sounds odd but once you've got say, the Orion nebula in view try looking just to the side. You'll pick up more detail.
I know you say you've got a telescope and that's great but never underestimate the power of binoculars, especially image stabilised ones.
Also I'm going to re-emphasis JohnM's point. Join a local society. It might sound odd but it really is better with other people involved and they'll all be happy to help and offer advise.