A "personal pledge" is a promise or commitment a person makes to themselves. It's a way of setting a goal or making a resolution that is important to them on a personal level. Full definition
Conversely, he identified himself personally with admirable people or policies and made a series of resounding personal pledges. (politics.co.uk)
European Parliament, Brussels, 4th October 2006 - Members of the European Parliament's Environment Committee made personal pledges and demands on climate change today as part of a Friends of the Earth Europe photo - action [1]. (foeeurope.org)
Rogers North had a goal of raising $ 2000; with personal pledges, donations, bottle drives & garage sales they surpassed it. (rogersinsurance.ca)