In times gone by, we used to run cars and aeroplanes until the batteries gave up, before waiting for the next time we could use them again. Put simply, we just stored them dead; however, this is not the case with LiPo batteries. Having said this, LiPo's should not be stored at full charge either. We would recommend storing them at room temperature at 3.8v per cell to get the longest life out of them. The majority of modern computerised chargers have a Lipo storage function that charges the batteries up to that voltage or discharges them down to that voltage.
Vapextech would recommend that customers put their Lipo's in storage mode after every run, as making this force of habit will benefit you in the long run. This means you don't have to worry about whether or not you remembered to put it in storage.