Starting up a Business... helppp

Hey guys,

I've posted my portfolio in the other forum, and 2 of you guys said it was alright, but not the best you've seen.

Now... my question is... How would I go about learning the different professional techniques used to make avertising banners, custom logos, and all the other features of making graphics that a corporation would use? Or something of the sort...

For example, I've been a major fan of http://www.banners2go.com for a long time now. They have constant banners and also animated banners, but their designs are the most eye-catching of them all. How do I go about doing something like these? Where do I start? What do I do?

My second question is this... Where did you guys learn all of your techniques.. And do you have any suggestions for myself.

I have no problem with getting clients at all because I have a bunch already... but I would like to enhance my skills... Can anyone help?

Here's my portfolio: http://www.x3k.net/portfolio