I'm assuming you'll be going with family. thus, i highly recommand Citadines Apart'Hotel

http://www2.citadines.com/index.html;jsessionid=adbKK4mwu9bwe83mVqGKr

It's a 3 star hotel chain, most of the properties are centrally located. My personal favorites are the one in les halles & Saint Germain.

 Le marais, Saint michel & Montpartnasse are a must. 

Upon arriving you must visit WHsmith bookshop in rue de rivoli to get a copy of timeout magazine for an updated happenings throughout the city.

The best restaurant/cafes in paris are in the 1st/3rd/ 4th arrondissement.

 Paris Metro is perfect & easy. However, paris is best enjoyed by foot. If you stayed in les halles you can walk to all the important sites (Notre dame, le louvre & le marais jewish quarter)

Nothing beats taking a stroll in Rue montorgeil with its food markets. specilaity food shops, small restaurants/cafes & trendy shops 

Paris best shopping is in saint honore with long string of boutiques & the must visit concept store "collete"

I hope this is helpful Laughing