Learch,
So far all the replies have good suggestions for you. I have a couple that I have found invaluable for kit and scratch building:

- weights. I use 4 to 6 inch lengths of 1" steel square stock to hold parts flat while the glue cures, or to hold them in place while glueing. If there's a fabricating shop near you, ask them if you can go through their scrap box to see what you can find. Even if they charge you a buck or two, you're way ahead.

- emery boards. These little fingernail files are useful for tight sanding jobs and lots of small sanding tasks. Get a big pack from the dollar store.

Have fun and happy landings.

papermache