primero Dumber than a box of rocks (or a bucket of hammers) Also applies: If dumb were dirt, he'd be about an acre. In the course of a life time you will, inevitably meet someone who just doesn't have the sense to come in out of the rain and couldn't find their butt with both hands. For every single magnificently smart person, there is an stunningly clueless person. There is also everything in between. Set your expectations accordingly.
segundo Beauty is in the eye of the beholder only because nobody but you can know what you like. Try not to be judgmental about what other people like - they don't see (or hear or taste or feel) exactly what you do. Be kind.tercio Measure twice, cut once. This applies to fabric and wood as much as anything I've dealt with. You can throw away some gigantic bank in a heartbeat by cutting a piece too short. The more expensive the material is that you are working with, the greater the chances are that something could go wrong. It seems to be exponential. Don't cut corners and think you're saving yourself time. Ever. Just measure twice and cut once. If you're, like, really tired or not well-fed - measure three times.