fell up to it
Or it´s like now: I´ve got the greatest desire in the word to go organizing the walk-in-closet right now, but I know I don´t have the time. And then that day that I have planned to do it, and have arranged so that I have the time, I will probably not have the same desire, or the power to do it, for that matter. I wish everything in life was "flex-time"-like. Then you could do whatever you wanted to do at just exactly the time that you wanted to do it. But I guess there would be things that never was done becaus you woud never feel up to it.