Make sure that you also remove any headers, page numbers or anything else that isn't necessary. You can add links to your websites or blogs: they become clickable links that can help drive traffic to you. Just make sure that they aren't on your title page. That's a big no-no for some.
Save your pattern as a *.rtf. This is the standard document format so they can convert it into an ePub for you. When you are in your writing program as as Microsoft Office or Word or whatever you use, click the Save As option. The *rtf option will pop-up in the bar beneath the one where you enter the name of your document. Or, you can simply save it as Your_Title.rtf.
Make sure that you follow the rules! The different publishers require different things like a link back to them, specific copyright wording, titles that specifically match the content, etc. Smashwords.com has a detailed Book Marketing Guide which is very helpful with this. Keep in mind that you may have to tweak your pattern a bit for each one of the publishers. It will most likely be only the first page, but the content will remain the same.
Be patient! It takes a while to get on to some of these. Your work needs to be manually approved by the publishers and that can take some time.
A few notes to take into consideration: all the publishers take a percentage and this varies from publisher to publisher. You won't get your full asking price so you may want to adjust it if you feel your pattern is worth specific amount of money. I kept the prices for my patterns the same across all the publishers regardless of the percentage. I like to keep things consistent but that's just me.
The payments can be slow in coming. Some pay out every quarter, some make you wait for their specified billing cycle. Some may want a PayPal account they can send the money to or an address where they can send the cheque. Most have a specific sales total you have to meet before they will even consider sending you your money. $10 seems to be about standard for PayPal accounts, $100 for a cheque. But once again, things can vary from publisher to publisher.
I know there is probably a lot more to this than what I'm sharing here, but this is what I know for sure. I'm pretty new to this, after all. If you know a little more about this than I do, by all means share it! I would love to know how I can help myself further my publishing career, and yours too!
For an update on my self-publishing adventures, please check out Self-Publishing Your Patterns and How-to's (Pt. 2)