20. Improve and Repeat
Don’t be disappointed if your ads get disapproved. Make a change and try again.
At Facebook multiple employees manage the same ads customers so if your ad is not approved at first then a change and a re-submission often does the trick to get your ad approved!
Create 2 different landing pages and split test them against each other. See which landing page nets more conversions and then change up the under-performing page.
Testing pages and ads against each other and continually making improvements will continually improve your profit margin.