General:
* Thrifty: This word implies being careful with money and resources.
* Frugal: Similar to thrifty, but with a focus on using things sparingly.
* Economical: Emphasizes using resources efficiently.
* Conscientious: Suggests being aware of the importance of avoiding waste.
* Mindful: Highlights being conscious of the impact of one's actions on the environment.
More specific:
* Resourceful: This word implies being skilled at finding ways to use things effectively.
* Sustainable: Focuses on using resources in a way that can be continued indefinitely.
* Zero-waste: Refers to a lifestyle that aims to produce no waste at all.
Figurative language:
* Penny-wise: This idiom suggests being careful with small amounts.
* Not a drop to waste: This expression emphasizes the importance of using everything fully.
The best word to use will depend on the specific context and the nuance you want to convey.