Adding contacts manually using the Create Contact option
Select Create Contact from the Contacts drop-down menu on the navigation bar.
Below are some additional options and configurations available when importing contacts....You may have contacts that are inactive which you wish to prevent getting "reactivated"....These can include contacts that are deceased, people who have completely opted out of any communication, or other options....Furthermore, inactive contacts do not count towards license limits....To import contacts as inactive, prepare a normal import.
Add Contacts to a Static Segment
The easiest way to add a single contact to a segment is from the contact's record. Navigate to a contact and click on the add link to chose a segment from the drop down list.
From this screen you can also see a list of all the segments this contact is in.