If still undecided try taking the general courses such as college English or math; it should buy you some time until you decide and most of the time, these classes are easily transferable if you decide to change schools later.

Also, if for example, you haven’t taken Latin in high school, and you say you want to major in Classics, the admissions officers might figure out what you’re up to, and it might actually hurt you, rather than help you. The other thing is that the unpopular majors are often things that are very difficult, so choosing them with marginal grades and test scores might not help you very much – the admissions people might think you’re not really capable of doing that major.

I don’t know how easy it is to change majors. At some colleges it’s really hard and at others, it’s super easy. It depends really.