Waraji are basically a form of zōri, so they are worn very similarly. The main difference (in wear) between zōri and waraji is that one's toes traditionally protrude slightly over the edge of the waraji. This does not happen with zōri. The other difference is that one normally doesn't wear tabi with waraji, as opposed to zōri.
Nowadays, it is mainly Buddhist monks who wear waraji. Most Japanese wear zōri or geta.
Everyone tied their waraji differently from one another. There was no standard way to tie waraji.
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