The first is from my husband. Pick your speed and drive at that speed; if drivers are slower, pass them; if others are faster, they can pass.
We seem to get into odd competitions over many things and often with little logic. Some have to do with speed - how fast one can complete a task like lawn mowing, ironing, writing a report. Others, like how many hours to sleep, or what financial priorities should be, or what party to vote for can be the subject of dispute, not to mention the target of advertising.
It's not that we cannot be swayed by new and better information regarding our "speed" in life, or that we should choose anything which would endanger others or be illegal; rather it's that the competitions and discussions arising from personal differences often take on epic proportions and have little to do with facts. Simply "driving at one's own speed" without argument, judgement, or discussion works awfully well.
The second idea to live by comes from the airline industry. If the need arises, put on your own oxygen mask first, then assist others with theirs.
People pleasers and those who take on too much for others would do well to follow this advice. If they make themselves sick from overwork, they won't be of any help to anyone and most likely will make things worse. We have to be able to breathe in order to be able to make sure others can.
The third idea is the teaching tale called the empty boat, from Buddhist tradition. In this story, a man is in a boat on a river, and another boat begins to careen wildly toward him. As the boat increases speed and zeroes in on the man, he waves his arms, swears, yells, and becomes very angry with the driver of the other boat. He wonders who would want to kill him and how anyone could behave like that; he gets himself very worked up. As the boat narrowly misses him, he sees that it is a driver-less boat. His upset with the other driver was moot. Buddhist tradition does not mention anything about blood pressure!
There is a stretch of road near my home that changes from two lanes to one after an intersection. For blocks before that intersection, drivers jockey for position, wanting to be first in the single lane. I used to get caught up in this sometimes, until I began to notice how often the other driver turned off and wasn't aiming to beat me to the intersection at all. "Empty boat," I would say to myself. One has to be so foolish only a few times before the "empty boat" comes to the rescue.
The book All I Need to Know I Learned in Kindergarten by Robert Fulghum preceded me by a couple of decades with the idea that some of the best advice for living comes from very basic situations. These three work for me.