Worth a look is Payscale to check out how much you really are worth and who is getting more than yourself. With over 300 000 salaries being added a month it provides and exhaustive world wide database of salaries. It will either make you feel really good or really bad depending on which direction you choose to look. Unless of course you are sitting at the top and there is no way you can look upwards.
Or, you could like me read an unauthorised biography of Steve Jobs and realise the futility of jealousy. Somehow I don’t think that he would be bothered to check his payscale. Interesting read by the way. Compelling central character who is both admirable and flawed. Perhaps in many ways a more genuine hero than the perfection that Hollywood like to present us.