stick to (something) = deal with this one thing
examples:
- Don't do whatever comes to your head! Just stick to the plan!
- Stick to your job and I 'll stick to mine.
- You have said so many things, you have confused me! Please, just stick to the facts! Stick to the point! Stick to the subject!
- Stick to your goals and don't worry about anything else.
- He is not very good with dramatic roles. He should stick to comedic roles.
