Learn the difference between “like” and “such as.”
In traditional grammar, “like” means that things are similar in some way, while “such as” means you are giving examples. The following sentences use “like” and “such as” correctly:
Girls like Judy never win in the end. (The writer is talking about girls who are similar to Judy.)
Little dogs such as dachshunds tend to yap. (The writer is using dachshunds as one example of a little dog.)
This is a really picky pet peeve. Some people care very much about the difference between “like” and “such as.” Others claim that the English language has changed so much over the years that there is no longer any difference at all. See how your teacher feels about this one.