Questions about Playlists

[redlandmover]

Heres the deal,

I have a mac at home and use iTunes+DoubleTwist to get my music on my droid. All works fine. However, at work i listen to alot of music (programming) on a win7 computer. Sometimes i find music that i want to get onto my droid. How does one go and manually input songs into a playlist? I could probably email/thumbdrive the music so i could get it onto my mac, so im not really too worried about bi-directional syncing. Just would like to queue up a song for the ride home. any ideas?