pwee - I don't know how far ahead you are planning, but here are a couple things to consider. The Yale Silver Scholars and HBS 2+2 programs would be great options for you if you're going into your senior year of college. I don't know the deadline for 2+2 apps off the top of my head, but it's got to be soon. Also, depending on the strength of your GPA, your GMAT and your extracurricular leadership experience, take a look at Stanford. They actively encourage students to apply directly from undergraduate institutions. MIT also encourages high achieving undergrads to apply; in fact, they even waive the application fee for undergraduate applicants.
If you're a year younger, say going into your junior year, take a look at some intensive 3 or 4 week summer schools that a handful of the elites offer. For example, Booth's Summer Scholars Program is a 4 week crash course in all things related to business - finance, accounting, marketing, etc. Plus, you have a great opportunity to put yourself on the adcom's radar screen for a future full-time MBA app, not to mention you will build a huge stockpile of material to use on essays. Tuck and Kenan-Flagler at UNC have similar programs. Also, if you're a minority, there are some great internship opportunities that I've listed on the attached spreadsheet. Check the second tab. If the hyperlinks don't carry through the attachment, PM me and I'll email it to you.
Finally, you may want to consider a one-year masters in accounting or commerce at a top-tier school. I happen to reside in the Southeast, so I am most familiar with UVA, UNC and Wake Forest, all of which offer strong one-year masters programs.
Good luck!