studies indicate that intentionally smiling moderately improves mood. When smiling, facial muscles signal the brain to align its activity with the smiling expression.
Motion sickness occurs when your eyes and ears send conflicting signals to the brain about movement, causing discomfort. Look outside or explain the movement to alleviate it.
If eye contact gives you anxiety, focus between the eyes. No direct eye contact but people can't tell the difference between real and fake eye contact.
If you want to give bad news, don't announce it. Say something soft so that the listener concludes the news instead of debating or denying it. Eg. Your uncle had a heart attack and couldn't make it. The listener finds this more acceptable when he concludes "so is he dead?" instead of going in denial about hearing "your uncle is dead."
If you are lonely, drink warm soup, wear socks, and get inside a blanket. The brain interprets physical warmth as social warmth, which then counters loneliness.
Break down numbers into groups of 2-3. Group similar things together. The brain loves well-organized and small information. And it's easier to recall.
If you are forgetful, tell your brain you have to remember something at a later date or time. This activates the brain's prospective memory which is responsible for "remembering to remember".