A few of the planes I've built have a high wing loading so I reduced weight by doing the following:
-Use mini servos instead of standard.
-Use light foamy type wheels.
-Go very gently with the fiberglass and only reinforce the firewall.
-Blance with the battery.
-If painting, use sanding sealer so the wood doesn't soak up too much the poly or fiberglass.
-Use thinner sheeting.
-Use 1 aileron servo instead of two. Not always practical though.
-Go a little smaller with the fuel tank. Careful with that one!
-Hollow out the ribs and formers before you start bulding.
-Use nylon pushrods rather than metal.
-Instead of using an EZ fueler, fill through the carb line.