Christin, very good suggestions.
I would just add the practice of forgiveness to the list. This applies to everyone regardless of your bucket list or end-of-the-world belief. Practicing forgiveness is a powerful healing and cleansing process. The benefits are endless. I have even heard of people experiencing physical healing from unloading their heart of the burdens of unresolved issues.
A close cousin to forgiveness is gratitude. Practice gratitude throughout all aspects of your life. Express gratitude for the people in your life, for the events in your life, for the abundance in your life. Apply this to everything, the good and the bad. Express gratitude for the flat tire that made you late for work. It may have saved you from a traffic accident. Express gratitude for your illness, for without it you may not have taken the time to rest and care for your body.
I would also like to add that the significance of Dec 21, 2012 has been grossly overstated in the negative. If you listen to the Mayan scholars they state quite clearly that the end date is the end of a cycle, not the end of the world as we know it. What we don't know is what the beginning of the next cycle will look like. It may be no different from Dec 20. We just don't know. Anyone who is predicting a dooms day is ignoring the facts and using the opportunity to spread fear, possibly for commercial gain.
Regardless, I hope we all make the most of everyday.