Be aware of the analogy around unconscious bias; Just because you know about it, doesn’t mean you are free from it.
A really interesting and free way to check how biased you are is to take the Harvard Implicit Association Tests. The Implicit Association Test (IAT) measures attitudes and beliefs that people may be unwilling or unable to report. The IAT may be especially interesting if it shows that you have an implicit attitude that you did not know about. For example, you may believe that women and men should be equally associated with science, but your automatic associations could show that you (like many others) associate men with science more than you associate women with science. There are around ten different tests on various subject matters, and your results are set against thousands of others who have taken part. It’s quite a humbling experience.