Wat can i do??...

Every now and then when someone does something that u in ur opinion is something not rite and yet u cant say it out or correct the person coz that person has the every rite to do that....you get that frus feeling in u, get wat i mean??...Well often i face that kind of situation and yet i never feel ease when that happens. Though that person has every rite to choose wat they wan to do but y do we or at elast feel this way??...well is just a conflict of opinions i would say. It is like 2 minds that has diff thoughts, one mind think way A is the rite while the other mind say way B is better, and when both doesnt agree with each other comes arguments etc etc...but some will choose to shut up and keep it coz of not wanting a argument. Then how do we overcome this then?? shout at each other till our ass falls off??, or should we just shut up and leave it?? i think we should sit down n talk properly in a calm n peaceful way. Will it work?? try it out n find out