Whatever you commit to do, don’t be half-hearted about it. When starting anything, fully accept what must be done and that you’re the person who will do it. Remind yourself of the necessity, of your desire and of your choice to make the commitment. Then put all your focus and energy into honoring that commitment. Make progress, not excuses. You wont always like everything you do but it's important to accept responsibility, within yourself, to do it.