I suck at using grammar and my writing is sub par. I require assistance with this!
In regards to this I most certainly recommend taking up reading. A lot of reading. I consider good grammar and writing skill to be learned skills and it's something you will need time to develop.
So my advice is read articles and the like. Don't understand some words used? Google the definitions. Learn from it. Take notes of grammar used and the like.
That's how I'd personally go about improving my grammar and writing ability.
And then he said, "LET THERE BE PRODUCTIVITY!" and promptly drank all the fucking coffee. - Gospel of a Programmer