Staying Loose

John Singer Sargent is my favorite watercolor hero.  His work was like that of a master bowman, whose arrow flies straight and true to the target most of the time.  His use of warms against cools, bold contrast, and bold use of color, great draftmanship and brushmanship always leave me breathless with envy.  Study is warm whites, his cool whites, his lights against darks, his light touch with detail, even in architectural settings.  His work has that nice balance of detail and loose painterly quality, resulting in a beautiful impression of the event.
Go onto google or buy his books, study his watercolors.  You will be better for it.