Yoga, peace and a stress-free life? Impossible?

For my New Year's resolution I had promised myself less stress. My first step was to find a yoga class that I liked and make sure to go. I went three times. I made so many excuses as to why I couldn't go, "This week I NEED to work late," or "I NEED to eat NOW, I can't go home and eat after yoga," or "My yoga pants are dirty, I have nothing to wear." So, needless to say, I got stressed. A lot. I still do. Every time I get their email newsletter I feel so guilty. Today's had a list, "Way of the Divine":

* Tolerate other peoples' weaknesses
* Give others enough time to change
* Rejoice with others and share one soul
* Soften your anger and help people change
* Do not Punish others or take revenge
* Do not allow Positive Actions to be cancelled out by negative actions
* Stand by Others even though they brought their suffering on themselves
* Do the Right Thing
* Go Beyond what others deserve
* Find a Small Place in your heart even for someone who does evil
* Focus on where a person came from and have compassion

Reading this makes me feel guilty. I don't know if there's a single thing on there I do. Over the past few years I've become so intolerant of people. In fact, I find myself often saying, "UGH I HATE EVERYONE!" I come to very harsh conclusions about them very quickly, I get joy out of people "getting what they deserve," if they're wrong/stupid/ignorant I automatically dislike them. It's sad. I used to be such a positive person, I used to love everyone. Don't get me wrong, the people I love I am ridiculously loyal to, I love them, I go out of my way for them, I want nothing more than for them to be happy and healthy and will do anything in my power to make sure they are. I feel that type of treatment should be earned, though.

After being treated badly by people I had once called my friends, on a few different occasions, my standards for people have definitely gone up. I don't know if this is a good or bad thing. It protects me from getting hurt, but it also has made me a little bitter and jaded. I spend so much time being angry that I don't let myself be happy enough. Hence the stress. I want to be posi!