I've never used a service, but even if you do, I recommend "How to Form Your Own California Corporation" (<a href="http://www.nolo.com/products/how-to-form-your-own-california-corporation-ccor.html" rel="nofollow">http://www.nolo.com/products/how-to-form-your-own-california...</a>) from Nolo for a good overview of the process if you're incorporating in California. It's not really very hard to do all the required filings yourself.<p>If you're planning to look for venture funding, you need guidance beyond what's covered in this book, but it's still a good intro.
Just came across <a href="http://www.clerky.com" rel="nofollow">http://www.clerky.com</a> which seems to be a preferred method but lots of startups. Anyone used them?
1. Harvard Business Services - delawareinc.com<p>2. Ryan Roberts at <a href="http://robertsfoster.com/" rel="nofollow">http://robertsfoster.com/</a><p>Used them both and happy with them.
<a href="http://www.incfile.com" rel="nofollow">http://www.incfile.com</a> is decent, but it's cheaper to just do it yourself. Most times it's not hard, you just need to submit a few forms.