My primary goal was pilgrimage (selfish, but in a good way). I also felt it was important to pray for and to help others in the process. I raised funds for two charities --- the first being a house that helps young, single mothers who decide to keep their unplanned child, the second being a newly formed hospice that was grounded in Catholic moral teachings around end of life and educated seniors around preparing for their end of life decisions.
My plan for raising money was that my son and I would carry a stone on behalf of each donor --- the bigger the donation, the bigger the stone. We had the stones blessed in Santiago and returned them to the parishioners at a "Pilgrim's Potluck" where we shared pictures and stories. We raised over $12,000 and ended up carrying just shy of 11 lbs of stones total. We also had the donors (as well as those who were unable to donate) write down some intention of theirs, and my son and I prayed daily for their intentions.
At risk of drawing the perennial topic of "suffering" into this, the act of sacrifice (carrying the extra weight was sacrificial for us), and the act of praying daily for the individual needs of over 200 people, may son and I learned a great deal about selflessness. Although we received no financial benefit from the donations, what we did receive was infinitely more valuable.
I would encourage anyone seeking to walk in support of a cause to do so.