It's common to set milestones for paying down debt. They're usually big, round numbers like $500, $1k, $5k, $10k. At the end of the day though, the goals are arbitrary. It's just a number, a stepping stone, toward the greater goal.
So if the day to day grind of fiscal responsibility is getting to you, change your milestones! Maybe it's $749, or $362.54. It's all arbitrary, right? Have fun with the game, and make it work for you. Set a new milestone -- whatever you like -- and celebrate when you reach that new number.
Sign up for a free 34-day trial of YNAB at www.youneedabudget.com