as requested.

Twitter Column.

go to your layout page(:

click on add gadget.

click on "featured" then you will find the "twitter updated" & click on it.

fill in the details.

once save, you can move it to the place you want it at(:

Addition Columns such as tagboard, formspringme, hits, facebook etc.

go to your layout page.

click on add a gadget.

click on "basic".

click on HTML/JavaScript.

fill in the details.

         

once save, you can move it to the place you want it at(:

the rest of the codes are as easy as the ones above(:
so there shouldnt be any problem to do the rest on your own(:
hope is easy to understand.