Answer:
Separate its main ideas.
Explanation:
Often run-on sentences are corrected by splitting its independent clauses into stand-alone sentences.
Example:
I wanted to go you to eat with you but you were busy, so instead I went to the store and then the mall.
[I wanted to go you to eat with you but you were busy,] so [instead I went to the store and then the mall].
I wanted to go out to eat with you, but you were busy. So, instead, I went to the store and the mall.
