GMAT Strategy

I just took my GMAT and scored a 680 (Q42, V41). I am not displeased with my score as I am a 31 year old non traditional who has done self-study. I am a Native Speaker and the verbal was lower than most of my practice exams (think I messed up the timing toward the end). But I also know I'm capable of a 700+. My last 2 practice exams were 740 and 710. I'm in MENSA so I've got the IQ for it - not bragging at all. I clearly know that I'm rusty from being out of school a long LONG time (and I wasn't a math major). I'm excellent at calculations but I'm definitely in need of some more theory - especially number properties. And I struggle with data sufficiency and figuring out exactly what their asking.

I would like to re-take the test in 4-6 weeks. I think the biggest thing I need is actual input from someone on my strength's and weaknesses. I love GMATClub but I need an expert in quant to look over what I'm good at and what I need work on, help me think through how to get the most bang for my buck in the next month or so of study. I'm sort of in that "I don't know what I don't know" stage.

How I prepared for my exam:

Went through OG Guide Problems (can do most quickly and easily)
Went through most of the Manhattan books (not religiously but most of them)
Magoosh - loved this service. Great short videos but no actual interaction. They were awesome on e-mail, though. Highly recommend.

Where to go from here? I don't need to start back at square one (I don't think) and take an entire class (Knewton, Manhattan, etc). I need a sort of "Finishing School" - the help to go up to a 720 or higher.

Are there tutoring options available for 5-10 sessions? I don't have a huge amount of money to throw at this but I think a few sessions with a tutor would me immensely valuable.

Any suggestions? I'm targeting Duke's full-time program as I'm headed toward brand management (coming from non-profit background).