well it's human nature to want to chase down those losses
you become less patient, you're not having fun, which i know affects my play, you are not as focused, you speed up your play, you feel like it's about time you get lucky, etc.
then you lose more
so either force yourself to be disciplined and forget the bad run or take a break
and remember that every great professional player has bad runs
oh and finally, i had a bad run which in retrospect may have been b/c my opponents had some stats on me ... if that is the case, then you may have to alter your play, switch games, switch sites, etc.