[header] How to stop feeling less clever than your colleagues [title] Seek additional training. [step] Probably the most tried-and-true method for increasing one's cleverness is to seek additional training. Is there a new skill that would aid in your job performance? Seek out additional training outside of work. 
This will lead you to perform better at your job, feel better about yourself, and to be seen as a clever over-achiever. [substeps] There may be some way for your employer to pay for this training.