When we went over the answers, I had the SOL strand (SOL2.3) written on the test. Once we went over all of the answers I encouraged students to identify patterns of missed SOLs. I also pointed out that SOL 5 (Greece) and SOL 6 (Rome) make up 25% of the test.
I got this idea from a fellow social studies teacher who teaches at a middle school across the county. She has had success with this during the SOL. She encourages the students to use their scratch paper in a similar way. Again, your fellow teachers are your best resource!