Currently I'm building Mately - a web app designed to help solo freelancers and solopreneurs stay on top of their time and energy resources. As a solopreneur myself, I struggled with this very challenge. I was pretty good at making plans, but they too often simply exceeded my time resources because I somehow lost track of what was realistic to accomplish. As a result, I made false commitments without realizing it, had to work overtime to meet promised deadlines, and increasingly lost energy because of the resulting frustration.