Question: how to decorate a mug?
Answer: UPDATE:
Step 1: Wash and dry your mug, if new. ... 
Step 2: Use a pencil to rough out a design for any words or lines. ... 
Step 3: Carefully draw your design with Sharpie paint markers.
Step 4: Add accent colors, if necessary.
Step 5: Bake dishes at 350 degrees for 20 minutes to set paint; let cool completely.