Be thankful for getting frustrated.  Recognize the emotions you feel and let them pass through.  Things happen and its normal to feel anger and frustration.  Be thankful when these feelings come up as it is an opportunity to overcome them and live with peace and love. Smile when someone does something that bothers you. Being frustrated or mad wont solve the problem and only serve to feed the ego. This is negative thinking, and to  be happy you cant afford to be negative.  Look for the positive in every situation, and live with positivity.