1) We align our countries by ethnicities & indigenous languages. Which would make more or less the same number of countries, I counted. 
2) We create African social media. 
3) We create an African-centred motor industry with vehicles from the same parts so they can be interchangeable. Solar-powered buses, pedal/solar powered vehicles, tuk-tuks & electric cars. 
4) We create an African operating system with it's own device manufacturing plant. We make our own Microsoft Windows with computers, tablets & smartwatches that run on versions of that software. 
5) A united African space programme. 
6) Five currencies: For northern, eastern, central, western & southern Africa. 
Just these six things alone, I believe, would improve Africa & the lives of Africans exponentially.