What you want to do is scoot the jig along bottom with short two inch twitches. James says hot areas for Sabine Lake flounder are anywhere along marshy shorelines where you have some sort of drainage flowing from the marsh to the lake. From Coffee Ground Cove on the upper lake down to Blue Buck Point is about 9 miles. Along that shoreline are 15 tributaries - some are large, others small. Three of the largest, and most popular, are Johnson, Willow and Bridge bayous.
Some tributaries draining into the lake are more productive than others at various times.
It all depends on how many minnows, shrimp, mullet and shad are coming out of the marsh with the falling tide. On a fast falling tide the fish will move in close to the drainage of the water. On a slow falling tide they might be scattered out around the mouth of the drainage or even up the bayou and into the marsh. Also, very important, is the water clarity at the mouth of a tributary. Where the black marsh water meets the murky bay water can be gathering areas for flounder.