http://www.nikonchat.com/af-s-dx-nikkor-lens/

How I can get a pretty nice background blur with an 18-55mm f/3.5-5.6G ED AF-S DX Zoom Nikkor lens?
Well, I wonder. should adjust openness to a better fit and reduce my shutter speed a bit to the background bokeh nice? Does it depend on the "mm" lens? It is the lens 18-55 mm enough background blur, if my subject is 2 meters away?
* Set the lens of 55 mm * place the subject closest to the lens as possible and still focus. This will give the maximum area of focus behind the subject
Nikon 55-300mm f/4.5-5.6G ED VR AF-S DX Nikkor Zoom Lens for nikon digital slr