How the fuck do people prepare for interviews these days???

No matter what, despite my years of work experience and doing job interviews, I still feel like job interviews are a crap shoot for me. It's especially hard for me, when most companies don't use the old boiler-plate interview questions (i.e. why do you want to work for this company, what are your strengths, how did you handle a difficult situation, etc.?), and no interview is the same company to company? At least back in the days, I could get by by rehearsing for the same stock questions, but now that's barely applicable theses days.