Don't listen to the advice here -- you are in danger of having your ballot tossed out!
Read this from the Tennessee Election Commission regarding absentee ballots:
10. Can the ballot be hand delivered?No. The by-mail ballot must be received by the county election commission office through the postal mail.
Good counsel -- to check out one's state's policies. These do differ state to state. Now I hate to bring up another sore point... however, years ago I was involved in a major initiative in a large state. We experienced problems with the US mail due to some anti-our-initiative activists working at the Main PO in that area. Post Office like all other bureacracies are being infiltrated by anti-Americans. Just a past experience, I'm bringing up here...