Using Illustrator the Pencil Tool must be used to lets you use quick presets to create a smooth, fluid path with fewer points, or a path that more closely matches your drawing intent.
As well as curves, you can now use the Pencil Tool to easily draw straight lines too, which you can constrain to 0, 45 and 90 degree angles if you choose. Adobe’s also added the ability to continue drawing from the end points of an existing path, and you can now close your paths with a curved or straight line. Learn from the below: