[The Z]

The first time I went through the game I got right to the ending, when I, for some reason, decided to quit playing the game. I want to pick P:T up again, but I can't seem to bring myself to do it...the sheer enormity of the game overwhelms me. I missed so much in my first game and I'm the type of person who doesn't like to miss much in an RPG. Obviously I won't be able to do every single thing, but I'd like to do the majority of things. My problem is I think I have no inspiration to do the majority. I'm having a hard time rekindling the fire that made me go through it the first time. Any suggestions that might convince me to finish the game again?