theres no quick answer for your question. you need to do a lot of things at once. post URLs, submit to SEs, paid seo links from high ranking sites, etc. if you are referring to one of your sites on your sig then this that would be a great start.
Put link to the site in your signature. btw, if you have too many pages, consider google sitemaps. Perhaps will get indexed quickly.
Just get a .edu link and your site will get indexed. I launched a 150,000 page site and it got entirely indexed within a week.
The PR7 link for one month isn't going to do you much good, and tghen in a month it won't be doing you any good at all because it will be gone. Go for the directory listings. But don't stop there -- embark on a systematic long-term relevancy-based backlink strategy. Short term strategies may get you short term results but what's the point? Unless you're a porn site or viagra spammer...