Add A Third Column To Blogger

Find the width of the content wrapper in CDATA section....increase it by about 200px depending on the size of sidebar.....
now add a div in the body part before the main wrapper.....and place a b:section tag over there......it should look something like this....
[div id='sidebar-left-wrapper']
[b:section class='sidebar-left' id='sidebar-left' preferred='yes'/]
[/div]
replace the square brackets with angular ones........
now it's time to configure some css...
#sidebar-left-wrapper {
display:inline;
width:auto;
overflow: hidden;
}
Third column is added!!