Write down the boundary
My most useful project document described what was included, what was not and who would approve the work. It was short enough to read during a call. Clear scope did not eliminate changes, but it made them discussable before extra work became a source of resentment on either side.
Separate revenue from available money
An invoice is not the same as a payment. I kept a simple calendar of expected receipts and recurring expenses, and asked a qualified local adviser about taxes and obligations. The figures were modest. Knowing which money was available made decisions less dependent on the mood of the latest client call.
A weekly review beats constant checking
On Friday I checked unpaid invoices, next week’s commitments and the state of ongoing projects. That appointment reduced the temptation to open the same spreadsheet throughout the day. A review needs a few useful questions, not a collection of charts designed mainly to make the business appear sophisticated.