Failing can provide invaluable lessons and making mistakes and experiencing setbacks is part of the DNA of every successful entrepreneur.
It is invaluable to have a friend who shares your interests and helps you stay motivated.
The person who kills for fun is announcing that, could he get away with it, he'd kill you for fun. Your. . . life may be of no consequence to anyone else but is invaluable to you because it's the only one you've got. Exactly the same is true of each individual deer, hare, rabbit, fox, fish, pheasant and butterfly. Humans should enjoy their own lives, not taking others'.
What is a diary as a rule? A document useful to the person who keeps it. Dull to the contemporary who reads it and invaluable to the student, centuries afterwards, who treasures it.
Practice is invaluable. . . honesty is indispensable.
There's nothing wrong with sexual feelings in themselves, so long as they are straightforward and not sneaking or sly. The right sort of sex stimulus is invaluable to human daily life. Without it the world grows grey.
Plans are worthless, but planning is invaluable.
Ah, there's nothing like tea in the afternoon. When the British Empire collapses, historians will find that it had made but two invaluable contributions to civilization - this tea ritual and the detective novel.