I am adding electric baseboard heaters to my house. I will be adding them to 3 bedrooms 1 bath and a hallway. I need to add a second breaker panel to supply these, what is the best way to do this ?

I don't understand the question.

Add up the wattage of the heaters you want and figure how many circuits you will need.

Electric heat is one of the few things in a residence that must be considered a continuous load. This means that the circuit must be kept to 80%.

A 20A-240V circuit can have 3840 watts worth of electric heat on it.

What other info are you looking for?