Here a good rule of thumb that I've always used and it gets me good rankings and lots of traffic.

I always design my pages as if someone at Google is going to look at them, you know to decide whether I should be booted or kept.

I worked with a guy a few years ago who discovered Google liked keywords in the title tag, and suddenly every page title had "Big Cocks, Huge Cocks, Thick Cocks ..." you get the idea.

More isn't always better.

Another thing I pay attention to when putting together a page: is this link going to add value to the page? Is it going to cross-link to another page of similar content, therefore increasing the chances that I'll sell something, but also increasing the chances that my surfer will find more of what they want.

I attended a SEO conference in May and the speakers repeatedly said, "Look, if what you're doing is adding value to a page or improving its surfability or enhancing your site in some way, it's legitimate, do it. If you're just doing it to get traffic, eventually you'll stumble and make a mistake and perhaps end up in hot water."

On every single gallery I put up, I place three thumbnails with text linking to similar galleries. For me, that's enough cross-linking. I could put a link to every single gallery I own on every single other gallery page, but I sincerely think that's overkill, unnecessary, and will eventually get me into trouble.

I hope this helps.
Cheers
Dzinerbear