When I was a freshman in high school I wanted to go to a culinary school and become a world renowned chef. After taking a cooking class I learned that I could not make food for a living. I then started to look into Tourism and Hospitality management. I mean, come on! Who doesn't like hotels? It would be so cool working at one, like a constant vacation! Soon learned that I don't have the patience to deal with tourist, thanks to spending my free time in Orlando. My senior year of high school/ freshman year o college I thought that I would make a killer doctor. I started re-watching "Grey's Anatomy" and I love science so it just made sense! Realized I didn't have enough motivation to put in the effort for med-school.
I went the first two years of college without declaring and yeah, it was scary and I had no idea what I was doing half the time, but it was better than declaring something that I wasn't sure about. I know of people who declare random majors and will change it a couple of months later after they are already enrolled in classes they didn't need anymore. I was able to take classes at random and had a better feel of certain fields of work without having to go through the headache of changing majors. I didn't declare my major until I finished all my finals of my sophomore year. To be honest, I wouldn't have declared until I got back to school in the fall but I'll be abroad and I want to have that done before hand.
If you want some help when it comes to picking a major, talk to the career planning office at your school or your academic advisor. Their jobs are to make sure that you are on the right path to graduate and find a career that you love! I spent so much time in the career planning office that I have my own space there now. Also, even if you want to change your major after you declared it, that's totally fine. This is your life and no one has room to talk when it comes to making life changing decisions.
Even now, I still think about what other majors are out there. Even though I know that the majors that I picked are the best choices for me, I still have doubts about whether they were the right choice. I feel like that's life, though, never being 100 percent sure of everything. Life is that way for me, I'm interested in so much that choosing a major/career is so hard.
The best advice that I was giving is, that most of the time what you major in is not that important, it's just the fact that you have a degree. (Key word there is most, not all) And remember you can't plan decades and having to make that decision when you're 18 is ridiculous. Some of the most successful people I have met went back to the school of some sort and are on their second career.