I need some work on the "like" and "such as" difference. Not so good with that one.
I am, however, quite adept at affect/effect, the difference between Chicago style and AP numbers, the that/which difference (nonrestrictive or restrictive), redundancy, tense switching, plurality, and the Oxford comma.
And I would like to know how much money I save by not purchasing coffee at Starbucks during the breaks. Maybe I should buy myself a present with all the extra cash.