The Italian Phrasebook & Dictionary by Lonely Planet, seems really useful. There's a small section at the beginning about the basics of Italian, pronunciation and grammar, then it's broken up into section.
The first chapter has the basics; Do you speak English, what day/time is it, numbers and amounts. Then it's broken up into sections, Practical for all your basic travel needs like accommodations, travel, shopping and the ever important bathroom. Then there are sections for Social situation, medical needs, safe travel and food. Translations are written out in Italian and phonetically as well, so you know how to say things.
In the back is an English-Italian and an Italian-English Dictionary and a great index as well. The sections are color-coded the suggestions seem very useful and at almost 300 pages and under 5 oz. it's small and light enough to put in your backpack or handbag. Recommended!