I've seen a few people use tape recorders, mainly anal retentive psych students, and the equally anal mature agies
Looseleaf vs book doesn't really matter..just so long as you can keep track of it all (keep in mind for the great majority of lectures .ppt files are posted and you just print them off and scribble all over them)..although, if you have lab work (looking at your sig, I doubt it), its highly recommended you have a book as opposed to random sheets.
And most people have separate systems for lecs/tutes