My
Healer Addon Page has some nifty expanding categories. These are useful in a page full of stuff where there'd be a lot of scrolling.
Plugin Used:
WordPress Tabs SlidesInstall and configure. Whee!

I left the default values intact.
Then, put code into a page or post for the sliding thing:
Code:
{accordion=heading} "Heading" is whatever you want your link to say
Then you put your content here. Use whatever HTML you want. Headings, links, whatever.
{/accordion} to close it
Here's an example, it's the LAST category (miscellaneous) on the healer addon page:

And obviously here it is in action:
Healer Addon Page.
In MOBILE THEMES your page will simply be auto-expanded as if you hadn't put in the accordions/slides at all. So it will still be viewable in mobile phones, just with extra scrolling that the tabs and accordions are meant to prevent.
You can, I suppose, do the tab thing using the same principles. There are instructions
here. I find that people forget to click tabs more than they forget to click accordions/dropdowns, so I am personally not using the tabs.
More accordion examples:
Blogroll and
Greatest Hits.
A final thing to remember... even though you can squish a lot on one page with tabs or accordions, it may not be the best idea. If you are consistently referring to a portion of a page, you may want to make a separate page for that information. For example, I am not going to put my contact form on an accordion or tab, because I like to refer to it, as in "contact us"... and don't want people to have to go to a multipurpose page and expand or tab-to the contact section.