Its important to use apostrophe's right. It's better not to unnecessarily split an infinitive. Only Proper Nouns should be capitalized. In letters compositions reports and things like that we use commas to keep a string of items apart. Watch out for irregular verbs that have creeped into our language.
Verbs has to agree with their subjects.
Avoid unnecessary redundancy. It's highly superfluous. A writer mustn't shift your point of view. Don't write a run-on sentence where instead you've got to punctuate it to break it up when necessary because smaller sentences are often better at making the point. A preposition is not a good thing to end a sentence with.