How to assess the accuracy of fitted logistic regression using glm

Hi,

I am trying glm with family = binomial to do binary logistic
regression, but how can I assess the accuracy of the fitted model, the
summary method can print a lot of information about the returned
object, such as coefficients, because statistics is not my speciality,
so can you share some rule of thumb to exam the  fitted model from the
practical perspective.

Regards,

Xiaobo Gu