New to MFP - Looking to get off this plateau!

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Hello all,

I've lost a lot of weight in the past year, and I'm on the home stretch to reach my goal weight. BUT, I've been plateaued so long I'm thinking of starting a homestead on this mesa. I went from 230 lbs (Jan. '10) to 170 lbs (Nov. '10), but I haven't been able to budge from there. I'm working out 4 to 5 days a week with double workouts on a couple of those days. My goal weight is 155-160. Any suggestions for reaching the finish line?