Pray.
I know that sounds like an elementry answer, but it is true. There have been times I have wanted to run away from my house screaming :)) but then somehow I stick it out. Marriage is never easy. Some of the ways I have learned to deal with stress in a marriage are:
*Always look for the good in your spouse. There have been times (when I needed this advice the most) that all I could find was to give my hubby a compliment and heart felt thanks for taking out the trash...I was half laughing inside, but guess what?! It worked!! He tried more and more to pitch in because I gave him a big hug and tell him thanks.
*Work on yourself. The only one you can really change is yourself anyway. If you have a better attitude, it will be contagious.
*Sometimes, you just have to hide. :) This may not be something you would hear from others but I think it is important if you are feeling out of control to just breath. Go listen to music, read, something to calm your mind.
*Talk to friends...I think this is a great place to do that because you don't have to worry about anyone (in family etc.) treating your hubby different if you are frustrated and just need to vent for a minute.
 
I don't have all the answers.. but these have worked for me.
Here is a link to a post I recently wrote about this.