You can create a "temporary" playlist by just doing a quicksearch. Yama will recognize the search when it switches to the next song. If you want to save the search you can just right click on it and add the search to a playlist. The inverse is also possible, you can do a search, right click on the search box and remove all tracks that match the search from a playlist. Of course you can create a new playlist directly from your search as well.
If that is not simple enough you can just drag the text in the search box to a playlist to add it, or drag it to "Create New" to create a new playlist.
Playlists have never been easier!