I never wore for long periods of time, so usually I just roll it up as good as possible, and if closing it is hard (sometimes the tape style tabs lose stickiness, or with something like Tykables Overnights the Tabs themselves only stick well to areas with the Cloth-Like cover) then I used Duck Tape over the tabs to make sure it closes really well, then plastic bag it and throw it out in the garbage can outside.
I rarely wear when outside of the house, and if I do it is usually a short trip, so I will dispose of the used diaper when I get home.
I also always have really good diapers, so never had to worry about a change if I'm only out of the house for a few hours at a time.