The north or mid-winter of the Medicine Wheel is the time of introspection- a time to reevaluate what is important to you. The prime time for this was the Winter solstice in late December and early January. Once we identify what is important to us at this time in our life, it is natural to consider the things in our life that serve or do not serve what is important to us.
If it is important to us, do we care enough about our lives to get out of our comfort zones let go of some things? Do we care enough to risk hurting some people's feelings and break some contracts we have with people that are no longer serve anyone? Do we care enough to walk through our resistance and fear to mean business with our life? We are here for such a short time.
It is not that the things we are letting go are bad- it is that they no longer serve us and what is important to us now. At a previous time in our life these things may have served us well. We may have needed them to get where we are now.
So... what no longer serves you? If you can let some things die, it will make room in your heart for something new. Letting the old die before the new has taken form is the ultimate act of faith.