Pocket Jacks. Advice on how to play them please

[EsandWhizz]

Iv just been stacked twice in the last two hours with pocket Jacks turning a 4 buyin winning session into 2 winning session. I have no stats but i know i lose money with this hand and its a leak i want to plug. I raise and reraise with them pre-flop and often push with them post flop if they are an overpair unless im up against a real tight player. Should i treat them as same as mid-pairs which are easier to get away from and play less aggressive pre-flop or should they be classed as a premiumn starting hand? Ideas on to play them please. Apologies for having no examples to display but im clueless with computers and dont know how to show hands iv played.