Listen to your instructor for advise. Most likely he(she) has been flying for a lot longer than you have, and has experienced their share of problems. Also Have them look over your plane, make sure that everything is right.

One tip I got from my instructor, was to break in the engine on the plane, this way is some glue joint is loose, it will come apart on the ground and cause less damage than if you are 3 mistakes high, and for example, you firewall comes off. After break in, recheck the plane to make sure nothing vibrated loose.

jacob