Interviewing is much harder than it was even a few years ago. I go into it knowing I probably won't get the job. It may sound negative but it relieves the pressure. I also make note of what I didn't do well on so I can work on it. Last year I wanted to leave my job so I would go to interviews at lunch and do phone interviews in the parking lot. I was turned down for soo many jobs. Just a couple of years ago I could get a job in one or two interviews. Things have gotten more complicated. It used to be if you knew even a little about a backend language and a little sql you could easily get a job. It has all changed. I think the javascript framework of the month thing has only made it worse.