high traffic for parked/undeveloped domains

you have a 2 or 3 worder keyword domain
you parked it at a fabulous.com style ppc service
you submitted your domain to major search engines

then what is the next step to make it high traffic website?

*forum signatures
*email signatures for yahoogroups style mailing lists
*free web directory submission
*add it to sedo.com database

any more suggestions please?

Rather than parking it with a service I'd develop some content, get some links in (trade links) and put some advertising on-page (adwords, or that style).

Over time people will link to good content, and you'll earn yourself much better search results.