[Sam T.]

I play horribly when I multi-table, not so much in that I make bad calls (I find it easier to fold), but I am unable to get a sense of when the opposition is weak and simple aggression will take down a nice pot.

To overcome the boredom, I keep very detailed notes on what each player does on each hand:
l=limp
m=min-raise
R=Raise (3-5 BB)
C=Cold-call a raise
l/c=limps, calls a real raise
l/f=limps, folds to a raise
S=Steal
F=Fold to steal

This keeps my hands and mind busy so that I don't wander off and start surfing, and it really allows me to get a good read on players to figure out who will go to felt with TPNK, who will let me steal, etc.

But I'm also in Marwan's camp - I do this for fun, so while I like the goodies I've been able to buy with my winnings, my hourly rate is pretty unimportant.