Advice: If you have free reign to choose any topic, think about what you know best. IE: follow the guidelines below to help you pick a topic:
Argumentative = Something you're most passionate about
Informative = Something you know a lot about
Compare and Contrast = A topic you are knowledgeable in but unsure which side to agree with
Continue to follow this guideline when picking an essay and prompt. Take the time to focus, turn your phone off, turn off music, and just begin to write, let it flow naturally and then re-read and revise later.
I hope this helps!
V/R
Colin