We’ve all spent too many hours hunched over a computer working on a pressing deadline or just getting absorbed in a creative project—with the resulting cricked necks and back pain. Here’s David Zhang describing the correct ergonomic set up in one of his Tech Thought by David videos. David recommends not doing five things that people think are good for us. He talks about why they’re not good for us and then recommends a better way. Watch the video.

• Don’t sit up straight for long periods of time.
• Don’t set your chair height based on your legs and feet.
• Don’t use desks with built-in drawers.
• Don’t use wrist rests.
• Standing isn’t good for you.