Calming Stress Relievers

Hi all, I'm new to the forum.  My H of over 20 years has ADD and recently accepted the diagnosis. I can defintely vent about ALL my frustrations and I've read several post and can relate to many comments.  I will comment in the future specifically but right now I need your help. I need calming techniques so that I can work with H on building our marriage back up again.  Just reading your comments makes me angry and I am tired of being so frustrated ALL THE TIME.  Can anyone out there suggest some great tips and techniques just to lower the stress and frustrations.  I can't have a conversation with him without coming across as harsh and bitter.  

Thanks in advance for your comments!