Here are some links to address some issues that have cropped up in your writing, while others are issues you asked about. Check these out. More will be added to this as the year goes on, but the weekly schedule will always contain a link to this post. Also, get her book if you like these podcasts. The video at the bottom is mine.
Run-on Sentences
Comma Splices
Sentence Fragments
Semicolon usage
Affect vs. Effect
Who vs. Whom
Lay vs. Lie
First, Second and Third Person
Apostrophe Usage ("Its and It's" and other issues you have faced!!!)
Ending a sentence with a preposition
Top 10 Grammar Myths
Video
Run-on Sentences and Comma Splices with Hamlet
