Plug Boards - Plug boards can be a great way to get your site out there. Now a days almost every site has a plug board. They are also a great way to get more visitors and returning visitors to your site.
Check out the links below for sites that have plug boards.
88x31 Plug Boards - 468x60 Plug Boards
Top Sites - Also known as Top 100 lists/sites are another great way to advertise your business. It is basically a link or banner exchange but you get ranked on how many people that click on your banner coming either to your website or to the top site list from your website.
Check out some family friendly Top 100 Sites
Forums - Messageboards and forums can be very helpful for any business. You can network with people, advertise for free, learn from others, and much more.
Check our some family friendly message boards and forums here
Groups - Yahoo and Google Groups can be very helpful for spreading the word about your business. There are network groups, advertising groups, and
swap groups.
Check our list of various groups here
