Is there any way you can quit some of your jobs? Perhaps the anger is your body's way of telling you that you are being pulled in too many directions. If you can give something up and get rid of some responsibility you may feel less stressed. That may help you have more patience and the other "cooling down" techniques you use might work better.
Whether you are able to quit some of the jobs or not, some things that help me are:
finding time for myself - maybe reading for 30 minutes during naptime or going out one night a week
getting the kids to help - my kids are 2 1/2 and 3 1/2. They help sort and put toys away, the also like to dust and mop
organizing my cleaning schedule - I spend 30 minutes or so in the "room(s) of the day" and 5 or 10 minutes in the other rooms
realizing I can't do it all - family is most important so some cleaning has to wait. I opt for cleaning the dishes, sinks, toilets and bedsheets before putting things away in their proper places. My husband has to help. Sometimes I get my parents to babysit so I can have a full afternoon to clean.
Good luck in finding something that works for you.