Anybody who is going to vote: if you have the option of voting early, and voting on the voting day, then it's better to vote early. Lines will be long (hours) in lots of places, from reading about previous elections.

And if you can, don't use the machine/electronic voting. It can be easily hacked and modified. The machines have been forcefully implemented by one private company in Alabama (not a federal organization) who doesn't even let auditors look at how they compile the results.
Use papers (and look carefully so the bubble/mark matches the name, especially on the presidential voting).