As a general rule, get linked from websites within your particular discipline. This is important for two reasons:
1. The more people see you linked to within a particular discipline, the more impressed they are likely to be, as Web linking is akin to word-of-mouth. If people see links to you on lots of other websites, [...]

Search-engine optimization (SEO) is often a tedious job and requires you to perform numerous tasks over and over. Fortunately, you can install SEO plug-ins onto your computer that enable you to save time and more efficiently carry out your SEO efforts.
Browser plug-ins have become increasingly popular because of the sheer amount of time they save [...]

Notes

You will need to register for each of these Social Bookmark sites before you can submit anything.
PS: I will be adding comments to these mid-June or so …
PPS: Note the important TIPS which moved to the bottom left side.
These links open a new window to allow you to check your site but still have this [...]

The most important place to submit your web site is not to search engines, but rather to search engine directories. Smaller and even large search engines regularly add content based on the directories. If you have a local site, make sure you submit to Yahoo local directories and online yellow page sites.

Use these tips to optimize your web site pages. Your pages should be written with your visitors in mind but created so that search engines can find them.