Just a word about playlists: As soon as an audio track is created, it has a playlist called "Audio" and the number of the track in the name. If you name the track before recording (as one should always do), the playlist will now be called whatever you named the track. So, in other words, whatever you name you track is actually naming the the playlist.
Let's say you've recorded some audio on a track named "Piano" and now you want to record an alternate take. using the playlist selector, choose "New…" and you'll be prompted with a dialog to name the playlist. The default will be the same name with .01 appended to the name. You can repeat this process to record multiple takes on the same channel strip but using several playlists. Think of it as having a stack of papers, each with similar information but only one piece of paper can be on top and that is your current playlist but there are other playlists beneath. Since Pro Tools appends .01, .02, .03, etc. to the name, it's a good idea (if you know you're going to do multiple takes, to create a new playlist right at the outset so that your first take is already named "Track Name.01." This way, each subsequent playlist will reflect the same number as your take. In the end, you can comp to the original playlist which has no number appended and it can be considered your final or master playlist for that track. Hope that helps, Slau