WHat do these stats mean?

I am swamped with data from thse stat counters and need some clue as to what I really need and what it all means.

Currently I look at

– wordpress.com stats
– statcounter
– quantcast
– and just recently mystat plugin

None of the data I get from any of these “stats” correspond to each other

I am looking for some meaning in a sea of data.

Any clue out there?

http://wordpress.org/extend/plugins/stats/