How do to it I am not sure

A "noble gas" configuration has filled shells. For the lower atomic numbered elements, that means, the filled octet rule.

Wikipedia - Noble gas (http://en.wikipedia.org/wiki/Noble_gas)

Note in the reference, there is a table of the shells that are filled for each noble gas. You're trying to find electrons from other elements to share so that each atom will achieve a filled shell like one of the noble gases.