Sociologists tend to study behavior at the level, whereas social psychologists study behavior at the level.

Sociologists tend to study behavior at the Group level, whereas social psychologists study behavior at the Personal level.
Sociologists will put more attention on how each member within a social group interacts with one another. Meanwhile, psychologist will put more attention on how a person deal with his/her emotions.

Basically create a schedule on what you need to study and stick with it