i use evernote on my ipad and have a 'notepad' for each course. i have a notepad just in case i need to write stuff, which i can take a picture of with my phone and upload it to my account, can revise on my phone on the bus, edit them some more on my laptop when i get home.
any other way just seems tedious, learnt from the hsc that having paper everywhere (even if you think its organised) really is still an inefficient way to go.