SEO conferences and resources?

I am web developer with over 10 years of experience in web consulting. Now I am going on my own and building different types of web sites (e-commerce). I am looking for professional SEO conferences and other SEO tools and resources to help me learn about search engine optimization as well as help me to find tools to use. So I guess my question is: what are the best SEO tools and where to find information about SEO conferences and schedule (by Google preferred)? NO ADVERTIZING PLEASE!