Good tests. We don't have fantastic tests at my current job, but we're working on it. Noticing something broke in a place you didn't expect before it appears i

Good tests. We don't have fantastic tests at my current job, but we're working on it. Noticing something broke in a place you didn't expect before it appears in production ends up being a massive time saver and anxiety reducer. Good tests seem tricky, since you want a combination of flexibility and rigidity, which can be a tricky balancer, but well worth it if done right.