Start with the country with the biggest population.
After each country, enter the country neighboring it with the biggest population which hasn't already been chosen before. If there are not any such neighboring countries, use the latest country which you have guessed which has such a neighbor. Continue until all the neighbors of all the countries in the list have been chosen.
Enjoy:)
France/Brazil, France/Suriname, Spain/Morocco borders ok
France/Netherlands, India/Sri Lanka, borders not ok
Nice quiz, but there are som mistakes: D R Congo is more populated than Uganda; Mexico doesn't border El Salvador, but Belize; Russia is more populated than Ukraine; and Qatar is missing.
Thanks!