Some terms that people commonly get wrong

et al. vs. etc.

Et al. is an abbreviation for et alia and refers to other people. Etc. is an abbreviation for et cetera and refers to other non-people, such as objects.

e.g. vs. i.e.

E.g. is an abbreviation e.g. for exempli gratia and means "for example." I.e. is an abbreviation for id est and means "that is."

For example, if I was to say "She doesn't like you, that is to say she wants nothing to do with you." I could write it as "She doesn't like, i.e. she wants nothing to do with you."

I hope this helped some of you out there.