I use a variation of the cyclocross carry.
(Not me, BTW.)
Commuters tend the be a bit heavier, especially with the panniers loaded, so the top tube resting on the sholder can become painful on the way to the third floor. I keep my right hand on the top tube where cyclocross riders use their shoulder.
This is also much easier on the lower back muscles--especially if you squat down, move the bike to the shoulder, then stand, lifting with the legs. You'd never take the time to do that in a cyclocross race, but as a middle-aged bike commuter, it works for me.