Verb conjugation of "concentrare" in Italian

There were two options, a connection flight to Phuket and one to Krabi. Generally, I wanted to reach the western part of the country, because it apparently had better weather this time of year.
Drinking coffee at night is supposed to be bad. Why? I have no idea. I believe the contrary is true. Coffee opens my veins and let's blood flow better and quicker. I therefore have nicer dreams, mainly from my last vacation in Italy.
I have a lot of fun while learning. Which one do you like better, Spanish or German? Last year I learn approximately 18 months Spanish as a second language, but then we had to leave the course.