Another gluing tip:

If you are going to clamp after it's been glued, try clamping everything together first WITHOUT glue to see if it will clamp down properly, especially in critical joints.

As said before, but a bit different: read ahead and make sure pieces fit before gluing it all up. For example, the built up firewall on my (still in progress) Tower Trainer did not fit into the tabs on the fuselage sides. This was much easier to fix than had I assembled the fuselage first.