So you want to apply to Yahoo. Assuming you are not already listed in the index your first step is to find the category page that best suits your site. At the very bottom of this category page will be a small "Suggest a Site" link. Click on it to get to the site submission page. If there is no "Suggest a Site" link, then the page you are on does not allow listings to be added to it, most likely because it is a general general top-level page. Keep searching until you find your right niche category! When searching for your niche category, try to find one that reduces your chances of being buried alive by other site listings. This usually means a very specific category and the more specific you are, the more precisely Yahoo will be when it comes to listing your site.
Follow Yahoo's instructions or else! If you try to sneak around their rules they will ban you. Do not try to break the rules by doing things like using numbers, too much gratuitous promotional language or brand names in your descriptions. This is one situation where too much SEO in your copy can really hurt you.
This may seem odd, especially in a business that seems to be all about promoting yourself but Yahoo will frown on any title and description that reads like promotional ad copy. What Yahoo wants is a descriptive title and description without any hype (and this includes phrases such as' the best real estate agent in town "and" unrivaled service ".
Also you improve your chances of acceptance if you can keep your meta tag description to about 15-20 words. You might as well edit it down now before Yahoo does it for you!
As Yahoo lists its sites alphabetically, it might also benefit you to choose a name that is among the first five or six letters in the alphabet. If you can come up with a suitable title for your site that starts with A, B or C then make sure you use it as it will rank you higher in the Yahoo search engine pages!