You can do only one thing at a time. I simply tackle one problem and concentrate all efforts on what I am doing at the moment.
Source: In The Ultimate Success Quotations Library, 1997.
-- Maxwell Maltz, (Mar 10 1899-1975), US cosmetic surgeon, author; He wrote Psycho-Cybernetics (1960), which was a system of ideas that he claimed could improve one's self-image leading to a more successful and fulfilling life.