Emphasizing speed and effectiveness:
* As smooth as a well-oiled machine.
* Like a bullet train, reaching its destination with precision.
* As swift and sharp as a surgeon's scalpel.
Emphasizing resourcefulness and lack of waste:
* As economical as a penny-pincher.
* Like a bee, gathering pollen with every move.
* As resourceful as a squirrel storing nuts for winter.
Emphasizing organization and clarity:
* As clear and concise as a well-written poem.
* Like a perfectly aligned puzzle, every piece fitting flawlessly.
* As organized and structured as a symphony.
The best simile for you will depend on the specific context and the nuance you want to convey.