Compile a list of colleges or universities that offer a second degree BSN program. These programs, designed for those that have already completed their bachelor's degrees, allow qualified students to jump directly into nursing classes.
Talk with an adviser from each university, to determine the exact prerequisite classes needed to enroll. Occasionally, a school will require students to take specific classes that either were either not available, or not completed during their previous undergraduate degree.
Look into taking prerequisite classes at a local community college, if needed. Many universities have a relationship with local two-year colleges that can make transferring credits between the two schools easier. Community colleges also tend to have much cheaper tuition than four-year schools.
Apply for any of the desired second degree BSN program.
Attend school after being accepted, and study diligently until graduation. In addition to damaging future career prospects, failing a course can extend a student's time in nursing school.