I like to figure out a rate of pay after adding in commuting time and costs for gas and mileage (whatever you choose to allocate for the increased depreciation and repairs necessitated by additional miles).
For example, just the additional time it may take me to drive to and from a potential new job, compared to a different new job = $2/hr for an 8 hour day. Also, it necessitates an additional hour of daycare for 2 kids ~ $8 for that hour, so total difference is $3 less net income per hour for the farther away job, and I haven't even considered gas and mileage! My situation is not quite that simple, though, as the job title and potential experience could possibly more than make up for the difference in net pay.