Bold and/or colored fonts lettering:
The engines consider bold and/or colored fonts lettering add emphasis to your content. Same with itals and underlines. While some old school website designers scoff at the use of bold and colored fonts, (I had one tell me it was unprofessional)*, the seo fact is the Search Engines look for keywords in your content that are in bold and/or colored fonts, italics, or underlined font lettering.
Avoid white unless your entire backround is a dark color. They look at white lettering on a white backround as a way to hide content. They really dislike hidden content probably as much as they dislike keyword stuffing.
H tags:
Turning your title into an H1 tag can be very powerful. Add other h tags throughout your content that contain your target keywords. Turn your usual copyright text into a final h tag and throw in some relative keyword phrases for good measure.
Keyword lists:
While I do not use keywords lists much, I have seen other webmasters use a string of keywords in their content with good results. Keyword lists are good as h6 tags that incorporate your copyright information.
Last 150 characters:
One of the items WEBCEO stresses is the importance of having your target keywords appear in the last 150 characters of your webpage. Typically, the last few words are your website copy right information. I found that by turning the last 150 characters that includes your copyright info into an H tag to be very powerful. It can be an h6 tag which is small enough lettering to be visible, but not overwhelming and does not detract from the physical appearance of your website. Combine this with a keyword list.
Don't be afraid to use your keywords many times. People may find it odd, but the search engines won't - and that is what optimization really is all about. You need to get the search engines to place you where people can find you as they use the search engine service. As you use your keywords, make them bold, italics, or underlined text, and use color.
If you run a traffic exchange, use that word and all it's variations many times in your content. Same with a digital product library, or a membership site, or a safelist. If you are marketing a specific product, use the product and it's brand name many times in the content and then use the bold, colors, italics, and underlines to add emphasis.