I know this thread is a bit old, but it's an interesting topic.

One thing that has helped me a bit is to be very careful, and a little generous if need be, in describing the self I'm trying to accept. I don't usually attack myself, but I can get very down about my prospects. So I don't try to accept that "things will never change and they suck", but rather, I shoot for something like "I'm stuck and I might not be able to change the issue I'm stuck on, but maybe I can improve how I feel about it". Or some such.

I've also realized that the thing I need to accept isn't the "issue", but how I feel about it. This works for me because the "issue" is almost always big and scary and outside my control, but how I manage my feelings about it seems pretty accessible.