In this tutorial, I'm gonna show you how to make another amazing paper plane that can fly really far. GUARANTEED.
Once you've made all of your folds and the plane looks symmetrical, it's time to trim it, or adjust it, for flight. This is very important, unless you want your paper plane perform a nose diving :))
Generally, I bend the back of the wings just a little bit and give it a gentle toss forward. You should try various toss angle to know which one is the best for your paper plane.
If the nose rises first and then drops, the plane is stalling. Bend down the back of the wing. Keep your adjustments small.
When you get the plane to balance on the air and float down gently, then you can give it faster tosses.