Perhaps we would do better to make a less permanent commitment, yet a very real one. There are only a handful of people in the world who know the whole Shas. You'll go much further that way. So a year's worth of commitment brings with it a year's worth of yetzer hora. Just one day's worth of commitment at a time will bring with it just one day's worth of yetzer hora.
Tomorrow is tomorrow.
There is a lesson for us in Menashe's teshuva. Don't worry about the weeks and months to come, and whether you'll be able to stick to your high ideals in the year ahead. Today, on Yom Kippur, let us all stand tall as people and as Jews, and decide at least to make the attempt at teshuva, one step at a time, one day at a time.