Fodors - A great website with restaurant recommendations AND customer reviews. I've found this nowhere else, and it's an excellent planning tool. What I did was make a list of the highest recommended restaurants in each city for my itinerary. Oh, and you can sort the restaurants by neighborhood, which is PERFECT! In general, I found that it was worth it to walk a few more blocks to one of Fodors.com restaurants instead of just "trying" one that looks good.
Fodors also has short descriptions of most of the sites in Italian cities. I cut these descriptions and pasted them into our itinerary. We will be able to glance at what the sight is about, and then refer to our Blue Guide for in depth info. Putting the Blue Guide page number beside the sights has been handy.