Before dropping your full courseload, SPEAK TO THE DSO AT YOUR SCHOOL OR AN IMMIGRATION ATTORNEY! In order to ensure that you maintain valid status and are able to return to your studies, you have to make absolutely sure that you take all of the appropriate steps. It may be necessary for you to switch from F-1 status to B-2 and then back to F-1.
Attorney Edward Weiner
http://www.immigration-aux-usa.com