Up until now, I still find myself challenged with the English language--either by speaking or writing. Although I passed my Communication classes during college, I failed to fully absorb the intricate rules of the English grammar that I supposedly had learned.
I am now in the process of revisiting and re-learning the English grammar. Strunk and White's Elements of Style has been very helpful. It is not as fun as how theoatmeal.com shares grammar rules but Strunk and White's handbook is easy to understand and follow. If you are having trouble in figuring out when to cut sentences, what preposition to use, when to use a comma, colon or semi colon, then this is the book for you.