Plan ahead of time who you want to visit! Then get a map of the exhibitors prior to your trip, one that shows SPECIFICALLY where the company's booth is located. Then prioritize the vendors you want to visit with, and have a PLAN in mind when you hit the floor! If you plan on visiting other venues, like the audio demos at the Venetian, take that into account, and plan AT LEAST half a day for those visits.
If you go in with a specific plan in mind, you will find you are able to visit a considerably larger number of vendors, see more gear, and most importantly, get a look at what you are most interested in FIRST...leaving the less important stuff for last, if at all.