No secrets here.
As I usually say, I spend less than 2 minutes processing each image.
When I'm travelling like now, I do that every night before I go to sleep.
Lately I've been using the Viveza filter of Nik in some images. That's the only different thing.
My standard process includes some clarity (less than 10), some sharpness (less than 40) and levels adjustment. Only.
For the B&W sometimes I use the standard PS B&W converter and sometimes I use the Silver Effex of Nik.
Of course the most important part is choosing the good light, along with a good camera and glass. As we say in Brazil, this is raining in the wet (obvious).