Lately I've been writing a lot in paper notepads and I've favored pens over pencils. I don't remember where I heard this idea originally, but there's something about using a pen which makes you grow a bit more comfortable with accepting that errors and mistakes will always happen but you can take action later on to correct those mistakes. With a pencil you often erase your mistakes and pretend they never happened. You're a flawed human, not a flawless writing machine. Expecting perfection from yourself at all times is very limiting. It's better to fill up a notebook with a mix of good ideas and mistakes than to leave it blank.