Need Advise:) (Rome)

Hello,
i need advise about Rome, i will be there this thursday 31 march to sunday 3 april.. this will be a short holiday and i have some plans but i dont know where can i eat best dinner(not luxury and touristic place) and where can i found is best night clubs or bars in Rome? i have one more question about shopping:) where can i buy best price local brands(not prada or gucci:))) thanks for your helping..