Next time you are in the craft shop, pick up some popcycle sticks. You will use these for all kind of things like, servo rails, reinforcing splices, skids, fuel tank stops, mixing epoxy, any place where you are going to put in screws. You will find all kind of uses for them. You can also use some of the top for a formed canopy. Cheap wheel stops Save the caps from your fuel bottles then when working on a model turn two of them upside down on the table and sit the wheels in them to keep the plane from rolling around.
Reinforcements Use bamboo skewers for repairs and reinforcements.
You can buy a pack of a 100 or more for a buck or so at the grocery store. Also great for mixing epoxy as they are stiff enough to stir with . If you need a hose clamp for your fuel tubing try this , Cut a small piece of tubing about a quarter inch long and put it over the tips of a pair of needle nose plies then spread the plies and slip the end of the hose through the smaller piece. Put on the hose and slide down the clamp piece over the fitting. Next time you go to the dollar store look for a package of cheep paint brushes, you can sometimes get a pack of 20 for, gee, well a dollar.