This is from Beth Moore, and it's just workin' for me today:
"For those of us who don't have one of those monumental, overwhelming reasons to be angry and we're just temperamental, irritable, and summarily lacking in self-control, sometimes it's just the matter of making a choice. As my grandmother used to say, we can get glad in the same clothes we got mad in.
Or, then again, we could just change clothes and see if that would help. One way or the other, it's time to get over it!"