Name says it all.
I got back two grades so far and am most certainly in the bottom 25%.
Leave grades/rank off your resume.
Try to get decent 1L work if you don't already.
Try to write-on to a journal and try out for moot court / mock trial.
Take clinical courses and volunteer at a law office to get real legal experience.
Read Walton's Guerrilla Tactics book.
EDIT: Also talk to your profs to see what you can do to improve. Did you just not know the law, or did you fail to spot issues (and if you failed to spot issues, were they the major/minor issues)? Did you dwell too much on certain topics/issues?