One of the keys to success is passion. If you care about something or want it naturally you won't need to force yourself to work on it. The passion will be your fuel. Only work on things you are passionate about.
He grinned and then stuck his tongue out and licked my forehead. I laughed and then tried to wipe where he’d licked. “Nope,” he said, taking my hand away from my head. “If I lick it, it’s mine.”--House of Korba