You can make manual nominations of awards from the Awards Manager as well as from within an individual's profile editor. Manual nominations are done for subjective awards like "Most Friendly Volunteer" as well as to handle mid-year awards and fill in gaps where the automatic nomination process missed an award.
From within the Awards Manager
Right-click on the list of awards (it's okay if this list is empty) and select Nominate someone for an award, then select the award type.
Find the appropriate person and click on their name to select them.
Edit the award's properties and click Save.
From within an individual's profile
Click on Add award. If this panel isn't visible, click on the Awards link on the left side.
Select an award type, then edit the award's details.
