My main electrical box has only two openings left to add breakers to. I need to add about 5 new circuits. Is it better to double up some of them and use the breakers that have two on them or to add a subpanel?

Either use tandem or half size breakers, if your panel can accpet them, the lable on the door will give this information, or install a subpanel to handle the additional circuits.

Hi skier

Either the mini breakers or subpanel will both work fine.

Subpanel more expensive and more work.

Chuck