I’ve been using ToDoIst for 2-3 years now to manage the many tasks I have for clients and big projects. They recently emailed a tool to help you decide which productivity method is the right one for you to use. It has to be something that you really will use over a long period of time.
I use a mix of electronic and printed. I put the tasks in ToDoIst so they don’t get lost then print them each day so I can get that endorphin rush when I check off a task. I print a list before a client meeting to be sure I talk about all the projects we’re working on.