Keeping to a resolution requires resolve which is an emotion. You need to introspect and make sure that the resolution that you have chosen is consistent with the price you are willing to pay whether it is monetary or a personal desire. Prepare yourself for the cost. It’s easy to say you’re going to give up alcohol but your mind is going to try to sabotage you every step of the way. Keep your goals to yourself and meditate on them. Take some time out of your day to cultivate the feeling of resolve within you. Literally just remember the feeling you have when you have felt determined to finish something and cultivate that feeling. It’s a fire that burns within you that can become stronger if you feed it. Finally, don’t get discouraged when you fail. You will likely fail a lot but that doesn’t mean you should give up. Keep to your resolution even if you keep tripping up.