Tips : 2 Colum change to 3 column layout

I wanted to change my 2 column to 3 column minima layout.
2 column seems not enough cater for more buttons & widget.

Able to find the free tutorial via the link given by Luthien (Thanks!) .

Here's the link
1) Three Column Minima (Layout Version)
2) Adjusting 3 column margins in Layout