Re: Getting Your Mind Ready. Fast.
I don't try. I just go to class in the state that I'm in, and take it as it comes. Some days everything clicks just right, but most days it doesn't. I'm okay with that. We train in the bodies we have, and also in the minds that we have, and while there are (generally speaking) things we can do to improve both, there are also limitations -- especially if our efforts are confined to the five or ten minutes before class, but that's really another discussion.
Not every class is going to be a peak experience. The way to develop staying power, in aikido or anything else, isn't to strive for perfection -- it's to glean what is worthwhile from the less-than-perfect. The dojo will be there tomorrow -- will you?