1. As soon as you save a new contact in your database, you will see their contact details page. On this page, click the More Actions link and choose Add to Campaigns from the drop down.
2. This will bring up a pop-up window with a list of all of your created campaigns. It will show you the "Campaign Name", "Type" and "Campaign Status". Find the campaign that you want to add this contact to and click the Add link for that campaign.
3. That will instantly add the contact to the campaign, click the Close button on that pop-up to go back to the contact details page.