During the spring and summer months, with so much market activity, the pattern is that everything gravitates towards the median.

Try to find similarities in the color schemes and finishes (some areas can get away with cheap counters, others have granite, some quartz, and a few are marble).  

If it's an attached unit, I work my way from the front, through the home, and then end in the back.Come up with a pattern to follow every time.

""Conveniently there is a way to track rudimentary traffic patterns across some of China's key metro areas, and they show that - in a confirmation of the worst-case scenario - activity, as measured by travel, across most of China appears to have ground to a halt."

You will quickly start to see patterns and realize who seems like a better contractor. 

Atlanta develops in a sprawling pattern, expanding even further and further outside of the Perimeter.

On the other side of the coin if you keep good maintenance records and you can show a pattern of plugging up the sink you can bill them if you had educated before hand.

All new grey cabinetry in kitchen and bathrooms, lovely marble look quartz countertops, beautiful back-splash, new stainless steel sink, new dishwasher, range and microwave.

They usually follow a pattern.

Isn't it more likely that there will be patterns of criminal activity?