Obviously, it depends on your profile, but there are a few angles for a college senior.
The first is to apply to HBS for round three, seeking deferred admission. This is popular among talented applicants who want to have a direct path, but still gain some work experience.
Another is to apply to Texas through the McCombs Scholars program, which allows for a handful of students to go straight in after graduation.
There are a few others (Georgetown, Wisconsin come to mind) that I've heard are kinder to younger applicants, but a lot of times it just comes down to showing the admissions office that your collective life experience have you ready (and needing) an MBA at this time.
Hope that helps!
Director of Admissions Consulting