Budget sheets, planners, CV templates. You solve one small problem and sell the solution several times.
Spreadsheet budgets, Notion templates, Canva designs, CV templates and lesson plans all sell as digital files. The trick is to solve one narrow problem well, such as a moving-house checklist or a freelancer's invoice tracker.
Sell on marketplaces built for digital goods, such as Etsy or Gumroad, or on a simple page of your own. Write the listing around the result the buyer gets, and show real screenshots.
Check the licence of every font, image and icon you include. If you cannot redistribute it, replace it.
Sales are slow at first. Once a file is finished you can keep selling it, and the second and third templates are easier than the first.
