Thanks for stopping by Larrdawg.

Pokertracker and Hold'em Manager can do wonders for a multi-tabler. When you only play one table, you can keep track of what players tendencies are etc., but if you are playing multiple tables, these calculators keep track of the other persons stats. How often they raise preflop, how often they reraise, and things like that. These all show up right on the table for you, so when playing multiple tables, it makes your decisions based on the players much easier!

I hope this helps you understand.
www.pokertracker.com
www.holdemmanager.com
Both of these sites have free trials PT (60 days) HEM (15). Give them a try, it definitely can't hurt.