Are you selling exclusively online? Will you be selling a boutique product that can only be found at exclusive stores? If you hope to see your products in a store window, you'll want to find out who the beauty buyer is for each retailer that you hope to be featured in.
Beauty buyers can be jaded. They're constantly being given new products to try and you really have to have something unique to get them to take notice.
Create a facebook page and twitter handle for your new beauty product. Start reaching out to everyone you know and send free sample products to anyone you think might be able to get your brand in front of the right person.
Contact beauty bloggers and writers and send them packages of your product to try. Hopefully they'll love it and blog about it to their readers.
If you work in a salon, ask your salon owner if you can keep some products at your station to sell to your clients.
Sell your cosmetic line in as many ways as possible. This includes visiting department stores directly to ask them to stock your cosmetics, selling online in your own shop and through auction or consignment stores and even through parties at which you demonstrate the cosmetics.
Have key selling points clearly in your mind. Have about five major reasons ready to tell people as to why your cosmetics line is amazing and worth trying. Be honest and have a background story as to why you started this business.
Good luck and Success!!