People never hesitate to offer unsolicited advice to the US president. But, understandably, in early November every four years, the advice comes thick and fast. This article, from veteran journo Michael Totten, about US Middle East policy is a good summary of my own feelings.
But, as it happens, I provided my own advice two years ago! I had a quick re-read, and I still think it holds true (except back then, well before primaries season and the emergence of Trump populism—indeed, even Western neo-populism/anti-establishmentism—I was predicting a Clinton victory).