Step 1: Gather supplies!
In addition, safety is in surplus. Keep extra sticks of glue handy and be sure to have more ornaments than one might expect to need.
Step 2: Organize!
Step 3: Plan!
Essentially, put things in place before glueing.
Step 4: Execute!
Step 5: Clean!
The societal man has a natural aversion to what occurs between an object's original state and the state of the object as desired (slaughter of animals, unrewarded hardship of outsourced employees, etc.).