Spontaneity is an under-valued trait. There's a lot of upside to not knowing how something's going to go and saying yes anyway. I'm not saying to be insane—there are certainly places to stop, take a breath and consider the options, weigh the pros and cons and seek advice from others. But mostly, saying yes is about trusting your own instincts, getting quiet and listening to that inner voice that's guiding you, trying to help direct your inner traffic if you'll only stop and pay attention.