Use the right tool. Don't rush. Don't be shy, but don't force it. Don't assume you'll remember how it went back together. Keep records of things like bearing sizes, spoke lengths and anything else you'll forget when it comes time to fix/replace it. Grease every thread. Have fun. Go and do something else if you find yourself getting frustrated and come back to it later. It's only original once. A clean bike is a fast bike. You'll always be happier if you took the time to do it properly.