1. Go to to Appearance > Menus.
2. Click on the + button or the create a new menu link. Enter a menu name and click Create Menu.
3. Using the Custom Links and Pages boxes at the left, add items to the menu and drag/drop to arrange them.
4. (optional) If you would like to use this menu in navigation, in the "Manage Locations" area, under Main Navigation, select your newly created menu. Click Save.
5. Click Save Menu and that is all.