Get something down to a fine art
Definition 1 of 1
Pro Tip 1/3Practice Importance
Indicates a skill perfected through repeated practice over time, not something achieved quickly. 
After years as a journalist, he has got writing articles down to a fine art.
Pro Tip 2/3Figurative Use
Used figuratively, not to describe an actual art form, but to express mastery in any skill. 
The team has got planning events down to a fine art, with each one running smoothly.
Pro Tip 3/3Efficiency Suggested
Suggests not only skill but also efficiency and ease in performing the activity. 
She has got packing a suitcase down to a fine art, fitting everything perfectly.