Write about each topic one at a time. Be sure to not intermix two separate ideas in order to maintain clarity throughout. Do your best to stay on task and not get distracted or go off on unneeded tangents. I would also suggest to separate each topic/idea into its own paragraph indenting each time. That's my advice on keeping your prose writing clear and concise. Hope this helps!
-J
The prepositional phrase for this sentence is "go until Friday." The word "go" is a preposition. Think of it as a squirrel and a log. To find a preposition, say "The squirrel (went) [insert preposition] the log." If it makes sense, it is a preposition. Then just find the phrase to go along with it!
A samurai from the edo period