This is the description for the index page of your site and so should include some appropriately keyword rich copy.
A quick and easy way of adding content to a site is to create a resources list. This can be anything from a simple list of appropriate web sites or it can be a full blown directory that includes mini-reviews of each of the sites listed.
Adding a list of useful web sites and be a quick and easy way of generating a content rich page that will be useful to visitors, but that should also rank well in the search engines if the sites are appropriate and the descriptions you enter for the sites make use of your chosen keywords and phrases.
If the site you are creating relates to a certain product category, e.g. children's toys, why not include a list of appropriate products. This could be a single page or it could be a collection of sub-pages with a main index page.
If your site relates to an industry that has various service providers why not create a page or several pages relating to the key players within the market place.
You might want to include a page listing several of the key players within the market place. Not all niches will allow this, but if your niche does then it can help you to generate more content quickly and easily.
For some niches you will find that there is an abundance of free press releases available. This is particularly true of the technology industry, but many other market places also generate significant volumes of news.
Sometimes you will find press releases on the individual company sites, other times there will be an industry body the distributes news releases to all appropriate parties and usually they will make them freely available on their web site.
Usually news releases come in a format that allow you to edit them. This can be particularly useful if you want to include some of your chosen keywords and phrases. Obviously, it is not ethical to change the meaning of the press release by adding inappropriate words and phrases, but it is fine if the words and phrases you add do not change the press release to the point where it is no longer accurate.
In addition to using other people's news releases you can also generate your own. These can be used on your own site and also distributed to third parties via services such as prweb.com.
If you have a lot of news items to include it can be worth splitting them into months and have a parent page for each month with subpages underneath. This allows you to create a significant number of pages for your site with very little effort.