I don't make New Year's resolutions, but I do set three intentions for the year at the spring equinox (there's still time to see how last year's intentions are unfolding). Affirmations, on the other hand, are a daily way to hit the re-set button and get life flowing in a positive way.
The easiest and favorite I use is, "I am so happy that only wonderful things happen to me all of the time." It feels silly to say, like how we all used to laugh at Stewart Smalley, but I continue with the affirmation and then my business for the day.
Here's an enlightening little snippet on the matter:
Affirmations
by Owen Waters
Affirmations are used to reprogram the subconscious mind in a desired direction. This helps to empower you to move through emotional blockages which may be limiting your opportunities to experience life to the fullest.
Every time you make a mental affirmation, your subconscious mind hears it and adjusts towards the reality of that statement. The subconscious mind does not filter, it just acts
on your statements. It is important, therefore, that you feed yourself positive thoughts about who you are.
A great way to start is to make a habit of using the classic affirmation, "Every day, in every way, I am becoming better and better."
Ignore any skepticism that arises inside you when you start doing this. That's just the automatic response which comes from resistance to change. Remember, for every action in life, there is an opposite and equal reaction. When you launch into an action which will cause change, resistance to change can manifest as the automatic, opposite reaction. Just carry out your action regardless. Keep going with your affirmation, and turn it into a habit.