Search Engine Optimization

I have been having difficulty finding any really good information on SEO for Elgg powered sites and the general search function on the community site seems to be missing since the upgrade. I was wondering what are some of the "best practices" used to optimize an elgg powered site? Google Sitelinks would be a great addition too but as they are automated by Google there is no control over those, does anyone have any tips for obtaining Sitelinks?