Google for advice on creating a good "robots" text. Also, write a good Meta Title and description. Make the Meta title the actual title of the site. Do not use hype and do not repeat your meta ketwords in your description. Write a two line meta description. For the first line state the purpose of the site. For the second line state the features on the site.

Example:
Title: Joe's Widget Heaven
Descrition: Devoted to the preservation and restoration of antique widgets. Convention highlights, articles, forum and photo gallery.

Do NOT try to highlight with caps or punctuation and never use the phrase "and more".

Then suggest the site to the lowest branch you can find in the appropriate category at http://dmoz.org/