On average, a worker with a bachelor's degree earns nearly double the pay of someone with just a high school diploma. We took an in-depth look at 129 popular college majors, seeking courses of study that typically lead to big paychecks at both the entry level and midway through a career. We also looked for majors that are highly sought-after in the workforce, as evidenced by high numbers of online job postings seeking applicants with specific majors. Check out our 2014-2015 rankings of the 10 best college majors for a lucrative career. 10.