Do you sweat the small stuff? To Fight or Not to Fight

Soo here's an issue that's been plaguing me: When is it right for someone in a relationship to voice their vexations and when should they just get over it to avoid confrontation? 

A friend of mine told me that she never fights with her man. If she has a problem he always avoids a conflict by immediately acquiescing to her wishes, which sounds like heaven to me, but leaves for feeling short-winded. Ideally men and women could just read each other's minds, but well....we all know it's better to just forget that. Maybe the frustrating thing about women is that many of us are easily irked or offended by every little thing guys do wrong. Guys and girls both overthink things sometimes, or a lot of the time, so when something is bothering us it can seem entirely too painful to never let the offender know that he or she did something that hurt you. But maybe sometimes it's really not that big of a deal and arguing over something small can just bring unnecessary tension and resentment. So how do you know what stuff is worth bringing to the table and what stuff you're better off just sucking up? Is there a 24 hour rule? Should you both just bring all your issues to the forefront so you can avoid hurting each other in the future? I'm naturally argumentative so I'm used to just throwing a fit about everything (sorry guys), but does anyone have another proven solution? Help us all out here.