I didn't even think of grad school until my junior year....oops! Luckily, my GPA is decent so I don't have to scramble. Anyways, my undergrad is geology and in this field you better much have to at least get a masters. Technically a BS will get you a technician job, but doing grunt work in the field for the rest of my life didn't appeal to me. I got involved in museum work because of my mentor. He gave me my first volunteer position, my first manager job, introduced me to other museum professionals, etc. Because of him, I've gone on excavations and have had internships at very respectable museums. I wouldn't be on this path I think without my mentor. So I got very lucky! I'm going to be a dork and say I didn't choose the museum life, it chose me. But its ok, not to know exactly what you want! A lot of my friends in the geology department were older than me and didn't do the traditional path. My boyfriend went to college on and off for nine years and is now at grad school. He went from a math major, to forestry, to engineering geology. He even thought about being a food scientist! But I would have to say grad school is a lot of money so I would be really sure before starting a program.