There are very few places and events during the Market where you have to make an appearance. You have to attend your orientation and go to the Registration facility on the first day, you have to attend your networking meetings, and, if you have one, you have to attend your screening. Other than that, your time is your own.
Discussions are great places to get tips from other filmmakers.
Have postcards or flyers and business cards with you at all times. Go to screenings, parties and the New Media Lounge. The panels and seminars are particularly valuable assets. They give you access to some of the leading filmmakers, distributors and industry people. The Angelika lobby is always a major destination.