You can model in a natural and organic way using 
		Quad Draw Tool, which offers a streamlined, one-tool workflow for retopologizing meshes. The manual retopology process lets you create clean meshes while preserving the shape of your reference surface. 
	 
You can access the 
		
Quad Draw Tool via: 
	 
- The 
		  Tools section of the 
		  Modeling Toolkit window, by clicking 
		   . .
-  The main menu bar, by selecting 
		  Mesh Tools > Quad Draw. 
		
-  The marking menu, by selecting 
		  Quad Draw Tool (to open the marking menu, Shift + right-click in the scene). 
		
For more information on how to use the tool, see the related topics.