Try scheduling your job interview towards the end of the workday or after 5:00 PM when possible, particularly if you have a current job. Besides being respectful to your current employer and their time, you can determine some great information about your potential employer. First, are they flexible, as some companies will only schedule within a narrow timeline regardless of your employment situation. Second, if you are at the potential employers after 5:00 PM you can see how many people are still working. This can give you some insight into potential overtime. To your job search success!