Hola Guerrero, I know you are not a newbie and I cannot add much to TGS's excellent advice, but don't worry too much... it sucks t be a foreigner if you are not used to it, but most places in central/south america are not very different from the US safety wise, just follow the same logical precautions. And have a plan to safeguard your money/cards/documents/contacts/laptop/lodging info/etc. in case anything happens, just like anywhere else.
Don't go to dangerous places, or places that can turn out bad past midnight. The locals will tell you. No matter how good looking and charming you think you are, usually nothing good comes out of drinks at 02:00 with a too friendly local female
If the worst happens, be prepared to lose some of your goods in order to preserve your physical integrity. No time or place to be a hero or demonstrate your martial skills.
If you can speak/understand some spanish (or portuguese in Brazil) it will help a lot.
That being said, I would not travel to Ecuador at this time if it wasn't necessary.
Don't even try to blend in, most people can spot a gringo a block away no matter how you are dressed. I'm a white latino, 6' and green eyes and most people can easily tell from a distance that I might be a foreigner but not a gringo.
Pleeease don't wear a rolex o jewelry, that's just plain stupid unless you are in a formal occasion in a safe place.
Take control of your cell phone ALL of the time, that's together with the watch/jewelry/wallets/purses are the most stolen goods at tourist places, just like everywhere else.
Again, just like everywhere else in the world 95% of your safety depends on your knowledge, planning and common sense, not that tactical folding knive in your back pocket or that snub on your ankle holster.
Have fun and enjoy your trip.