I frequently have people come to talk to me who feel defeated because they can't come up with a strategy or a plan that solves everything about their predicament in an ideal way. Encouraging them to do something small can be really difficult because there is often a huge resistance to such an approach. That's probably why I like the following so much:
The doing of something productive regardless of the outcome is an act of faith. The doing of a small something when a large something is too much for us is perhaps especially an act of faith. Faith means going forward by whatever means we can.