As a spinoff of the bombdrop, make a glider release.

Don't get a gyro, learn to fly REALLY good and then play with them if you want. They'll really hinder your advancement in my opinion.

Remote glow drivers are great.

Running lights, landing lights. If it's a warbird, RAM makes a nifty machine gun SFX module. ALl sorts of ideas. Use your imagination.

Use that miximg capability, too. On my 9C, I had a switch set up as an airbrake for my Laser 3D. When I hit the ground, I flip switch E and I get about 50° of spoilerons and 50° up elevator.
I also set up a touch of spoileron on my spring loaded switch (IE Trainer or Snaproll switch) to help in elevators.

Most of all, HAVE FUN. That's what this hobby's about, right?