Latin abbreviations like i.e. and e.g. are often used wrongly and too often. Here’s some advice on dealing with these and other “handy” abbreviations.
The difference between that and which, when used as relative pronouns, is one of those usage issues that most people think of as picky and unnecessarily pedantic. Yet mastering the subtle difference in usage between the two words can add a lot of punch to your writing and make the examples you use in your sentences clearer and easier to understand.