As with many things in life it is a balance and learning to say No can achieve a better outcome than saying Yes. This is the case where seeing and saying yes to too many good opportunities can cause someone to overcommit and spread their mental energy, time and finances too thinly across their numerous projects. The ability to say no to some opportunities and yes to others therefore becomes important. Knut Haanaes talks about this “exploitation or exploration” in this fascinating TED Video.