Just got word that a big project we'd invested a lot of effort into isn't going to happen. In the past, I would have pinned a lot of hopes on that money coming in, and been in a panic when it didn't.
These days I know better. No project is certain until the money's in the till.
So many metaphors come to mind. Don't count your chickens before they hatch, f'rinstance. It's easy to say, look, we've got eggs, therefore, we'll have chickens. Or, look, we've got hot prospects, therefore we've got a project.
Speaking of eggs, don't put 'em all in one basket. If you earn your living primarily from a single client, that client owns you. In reality, you're en employee, not an entrepreneur. Have plenty of smaller eggs, not just one large one.
And more than one basket, if you can arrange it.
Twenty small streams of income is more stable than 2 large streams. Seems nothing is stable these days, so when you start juggling all those chickens and eggs and baskets, be prepared to lose a few.
If you've got spares, there'll always be enough for that omelette.