Do the gliding bit.
Real pilots don`t need engines.
Seriously though, you will learn more about flying on a gliding field than you will at the average flying school or club. Unfortunately,under the new regulations the saving of flight time required to convert a Gliding Silver C Certificate to a PPL A is much reduced. The new JAR PPL course is 45 hours but one tenth of your gliding hours can be deducted but only up to a maximum of 10 hours. i.e 35 hours instead of 45.
Good luck
Mike W