Some of Useful Drupal modules

The first modules you should install are: Advanced Help, Administration Menu
The needs of this site are as follows.
General modules: Nice Menus, Rules, Taxonomy, Views Slideshow
Multiple page status: Twitter
WYSIWYG HTML editor: IMCE, FCKeditor
Product Catalog: Views, CCK, Tokens,ImageField, FileField, FileField Paths, ImageField Tokens
Glass Artists Profiles: Advanced Profile, User gallery, User tutorials/How-to's, User video tutorials
Retail online store: Ubercart
Whole-sale point of sale software: I don't know if this will ever be implemented but its nice to dream lol.
Forum: Voting API, Fivestar, Advanced Forum, Flag
File Organization: File upload
PDF, email, print: Printer, e-mail and PDF versions with wkhtmltopdf,
Image: thumbnail creation, Image Upload, Lightbox2
SEO: Page Title, Seo Checklist
SEO friendly url creation: PathAuto
Statistics reports: Google Analytics
Ping pages: Add to Any Share/Bookmark Button
Site map: XMLsitemap
MetaTag: Nodewords
Email: Email Field??
Email list manager: Simplenews, Mime Mail
Theming: Panels
Automatic backups: Backup and Migrate
Calendar of events: Calendar, Date
Retail store search: Location, Gmap
Spam prevention: Mollom
Messages: Notifications, messaging
Feeds: FeedAPI
Classes: Signup