We seem to have hit the time of year where most of the road races have been replaced by criteriums. Those of you who have made it out to the practice crits know that the physiological demands of a criterium are different than that of a road race. In order to perform well in a criterium, your training needs to include workouts that simulate the demands of these races. Here is a link to an informative article on training for criterium racing.
In short, the best thing you can do is participate in the Tuesday Night Crits. These events will not only create the physiological stresses needed to improve fitness for criterium racing, but also improve the bike and mental skills needed for these events. If you can't make it to the Tuesday Night Crits, then try to spend one day a week performing the interval workout described in the linked article.