Help:Rome,Italy 2010

Hi Guys, hope you are well, i was wondering has any of you been to Rome, Italy or live in Italy?,because i need some help/advice. I'm going next week with friends, can't wait and wanted to know these things here:

1. Where are the good places to shop in Rome?

2. Good places to eat?

3. Good bars?

4. What type of clothes to wear?

If anyone can help or reply, that would be fantastic! :-)

Have a great weekend xxx