After the first lap memorize the critical sections of the course. Crosswinds, headwinds, tailwinds, cobbles, downhills, tight turns, steep hills, all will play a part in the unfolding of the race. Over there the best riders look at the course in that way. Everyone hangs on for mercy while the smart and strong play chess with the field. Learn about the local riders and teams.
Teams are obvious, but there are other less obvious groupings.
It's fun to try and figure out if there are combines. Usual suspects are those guys on different teams who always seem to breakaway together. The same guys that you'll see hanging out together before and after the races. This does not violate USCF reg. Anyway you'll be in Belgium, c'est normal.