Typing if I can help it. I used to take notes on a pen and paper at University but now I just take my tablet and the (silent) keyboard and take notes that way. Much quicker and has additional benefits, like if you save everything as PDF you can search multiple files at once so it makes referencing and referring back much easier than pen and paper ever could be, and organisation takes a lot less time, and you can back-up everything you do! So it's quicker and more functional, and I'll stick with it. I still keep a little notepad and pen in my purse just in case and usually only write to scribble little things down.