I look to external sources to enhance my internal motivation. I'm currently in the best place of my life and am trying to be a good person on a daily basis.
If you're unmotivated or looking for something to give you that extra "umph", I would HIGHLY recommend checking out Gary vaynerchuk. An easy way to break into him would be to watch his Joe rogan podcast.
He's not right about everything. But he's got an interesting story and he preaches practicality.