I've been contemplating the issue in the headline, as pertains to my value. When I help somebody in 40 mins with something they've been stuck on for 3 months, my value is clear to everyone. When I work there the whole time, and nobody ever gets stuck for 3 months, my value is unclear. Don't know how to deal with this paradox.
Value and opportunity are chaotic processes in effort and time.
All we can do is to try to maintain the levels of workload such that we have clarity of mind to seize opportunities when they reveal themselves. Honest and balanced colleagues help there, but that is ultimately a missions for yourself only.