Ok, here we go step-by-step :) (more roses required after this! LOL LOL LOL)
First thing you have to do is create an account with PhotoBucket or another site that offers the option to upload images (ImageShack, Flickr etc. do the same - choose one you like best).
In this case I'll use PhotoBucket as an example.
In PhotoBucket you create an account in just two steps:


When you have created your account the email you entered is your username, so use your email + password and if you're working on your own computer you can choose 'remember me', so you won't have to login again and again;)

When you're logged in you have an option to choose which files (images you want to upload).
A little window pops up to give you hints on what to do:

You can add as many as you like - it will just take a bit longer till they're uploaded then.
I'll chose one in this case.
Clicking on ok gives an option to browse to the file on your computer.

Select your file, click ok and then you'll see it upload:

When uploaded you're guided to a page with options to add remarks etc.
I never use them, since I use my account for tutorials etc., but if you use it for pictures it might be handy.

Click 'return to album' at the bottom and you're guided back to thumbnails of your images.
Thumbnail of my file in this case:

At the bottom of the thumbnail there are several options.
If your options are different, you see a blue link at the bottom of those again called 'Link options'.
When you click that you can select what you want to see with your thumbnail.
I find Direct Link, HTML code and IMG code are the most used, so you'll want to show at least those options.
For How To Geek choose 'IMG code'. Rightclick on the link and choose 'copy'.

Go to your post in HTG and paste the code you just copied into the textbox:

Click ok,
and this is what the result should be:

Enjoy,
Sarah James.

And another one you should have (LOL). Thanks again...Garry
