I constantly discover new sources of income.

A second income is worth more than its size. Forty pounds a week from something on the side does not change the arithmetic much; what changes is that one employer stops being the only door.

There is a particular calm available in a meeting when you are not the person who cannot afford to lose the room. That calm is usually what people are really after when they go looking for another stream, and the money is almost incidental to it.