1. Take the Resort Monorail
Magic Kingdom's main monorail gets crazy busy towards the end of the night when everyone is leaving. Head over to the resort monorail instead. The line is always shorter and still stops at the Transportation and Ticket Center. The only caveat is that the monorail seems to appear less often and you do have to account for the added resort stops. But hey, that's just more air conditioning you get to sit in!
There are way more tips we could include on this list, but we'd better stop now so we don't take up your entire day ;)
Have fun making good use of this information!