Best Tip is link Exchange ;)
OPD (PR 8 Website) provides directory listing to Google, AOL, AskJeeves, Lycos, Teoma, Netscape…..and many more
Submit it @ http://dmoz.org/add.html
Keywords play a very important role on your webranking. Check out this usefull tool on Keywords related research and start writing down your keywords 
more @ http://www.goodkeywords.com
Keywords research tool for top search engine ranking
The best keywords are those words and phrases commonly typed in by your potential customers, but which aren’t used much on your competitors websites. A very good link to start with your keywords
more @ http://www.wordtracker.com/
Web 2.0 can choke the life out of your Web site’s search channel
An interesting article @ http://www.clickz.com/showPage.html?page=3625943
Top 10 SEO tips to get a high ranking for your website
