There's my hero who's a professional surfer. Try finding out an average day in the life of a pro surfer or how much money they make a year. I've been trying off and on for a while now and I've had no luck.
I had a million questions about the Los Angeles Police Department that I couldn't get answers to online. I emailed the LAPD public relations office asking for help and never heard back. I figured they had to be used to goofy questions from writers, but maybe they get too many of those.
The other problem I sometimes run into is when I need to search for information from another country and it's a country that doesn't speak English as an official language. Translating page by page to try to figure out if what I need is on that site is torturous.
I always seem to get characters interested in things I know nothing about: Restoring cars, glass art, surfing, archaeology, Polynesian dance, sport fishing... well the list goes on and on and makes things challenging for me. I keep reminding myself that it could be worse. At least these topics aren't as bad as some of the stuff other writers have been stuck researching.
