The 20-20-20 rule: Every 20 minutes of screenwork, look at a spot 20 feet away for 20 seconds. This will reduce eye strain and is easy to remember (or program reminders for).
Don’t punish people for trying. You teach them to not try with you. Punishing includes whining that it took them so long, that they did it badly, or that others have done it better.
Compliment people more. Many people have trouble thinking of themselves as smart, or pretty, or kind, unless told by someone else. You can help them out.
Sometimes things last a long time because they’re good (jambalaya). But that doesn’t mean that because something has lasted a long time that it is good (penile subincisions). Apply this to relationships, careers, and beliefs as appropriate.
When you ask people, “What’s your favorite book / movie / band?” and they stumble, ask them instead what book / movie / band they’re currently enjoying most. They’ll almost always have one and be able to talk about it.
Procrastination comes naturally, so apply it to bad things. “I want to hurt myself right now. I’ll do it in an hour.” “I want a smoke now, so in half an hour I’ll go have a smoke.” Then repeat. Much like our good plans fall apart while we delay them, so can our bad plans.