In regards to "best spot" you might want to read the "reading water" and "reading outside water" posts.
I believe knowing the difference between structure and cover is nearly as important as the difference between spots verses patterns. Knowing that structure is a perminate physical lake bottom feature, man made or natural, verses cover as something that grows near, in or on the water, such as trees, brush, weed beds, floatsum and man made objects such as floating docks (cribs, pilings, piers are considered structure). When cover is combined with structure and located near prey at the depth the bass are holding, then you have a potentially a good spot. If bass are active on a good spot and you can locate other spots with the same features, then you can develop a pattern of good spots. First you need to know why the bass are using that location to determine a pattern.