Seems like most people only has New Year's resolution and very often, we forget about the commitment after awhile. Maybe its a good idea to have monthly resolution instead, that will keep us in check!
My Dec's resolution : Spend wisely. Its tough but it can be done with some self control :) Think carefully how important is the thing to you. (Hahah like real, sure kana suan by colleagues the next day after they read this)