Transitions
In general, the place in a song where I am the most likely to make mistakes is when something is changing. Some examples of important changes in a song include changing meter, feel, or dynamics. Working on these types of transitions is one of the most important and also most overlooked elements of drumming. Transitioning succefully is a skill just like anything else, and needs to be practiced and refined as such. Some examples of transitions that almost everyone could be better at include switching between brushes and sticks, going to double time or half time, switching between latin and swing, changing meter, and changing dynamics suddenly.