don't want people to recognize you? it's easy! just add/subtract one item of clothing and/or facial hair. examples: add a pair of glasses, take off those sideburns, wear an ascot, etc.
want to go super deep undercover? change two things! it's the oldest trick in the book. clark kent, that white guy who pretended to be superman, all he did was take off his glasses and work clothes.
which brings me to my next point, another smart move for disguising yourself: wear superhero clothes under your work clothes.