If your polling site allows you to put an early ballot / absentee ballot through the machine, then you should be good. Be sure to take ID with you to prove that it is, indeed, your ballot.
If, however, you are simply dropping off an early or absentee ballot in its envelope at a polling site or designated drop-off, then make sure of two things about your signature, which is usually required on the outside of the envelope:
1.) It needs to read exactly how your voter registration reads (see how your ballot is addressed to you). So, for example, if that reads with your full middle name or just your middle initial, sign your name using however this reads. As another example, if your voter registration includes "Jr.," "Sr.," etc., then you need to include that on the signature line.
2.) Sign your name as close to how you've signed it on your driver's license (as far as slant of letters, etc.). However, refer to item 1 above as to what should be included in your name, as this may be different than your driver's license.
I don't know if you've had the chance to click through and read the story I posted. It was exactly this "exact match signature" issue that happened with the young man I helped to get his vote counted.
Hope this helps!