How do I get 3 columns in my blog?

Having 3 columns is awesome and I couldn't live without it. Not for a second! I found this awesome bit of code, simply copied & pasted it into my blog and as if by magic, I had 3 columns.

Now, before you do anything else, log into your blog, click Customise > Layout > Edit HTML. Now what you need to do is click on 'Download Full Template' and save your current template to your pc. You can also copy and paste all of the code into a notepad document. But don't use Word. Keep this template safe in case all goes wrong :(

Now, you have 2 options.

Option 1; You can click on this link and copy & paste all of the code into your blog 3 column code Make sure you have deleted all of your original code first. Then, click 'Preview'. Any good? If you are over the moon with that, great, click save and you are done :D

Option 2; Leave you current code as it is, and scroll down until you find a bit that looks like this;

Outer-Wrapper
----------------------------------------------- */
#outer-wrapper {
width: 78%;
margin-top: 15px;
margin-left: auto !important;
margin-right: auto !important;
padding:0px;
text-align:left;
font: $bodyfont;
}

Click on the link 3 column code and scroll down until you see this bit in the code;
Copy from 'Outer-Wrapper' down to just above 'Headings' and paste it into your blog replacing the original 'Outer-Wrapper' section. Now, click preview and see what it looks like. If you keep getting errors, try using option 1. I hope this works out for you! Please leave links to your 3 column blog in the comments section :D IF you get stuck, let me know and I will try to help!

So, here we go!

Welcome to my blog. I have been trying to decide whether I should make a blog for about 4 months now. I could never think of anything interesting to write about, but then I had an idea! I am not going to tell you my idea just yet, you will have to come back later to find out (building the suspense here!)