Always leave the camp cleaner than you found. In the first chapter of the clean code, Uncle Bob talks about the boy scout rule, which can be summarized as: Leave the code cleaner than you found it. Meaning that every time that we make a change in our code base, make an improvement in the code.
What is a camping footprint?
What is a Tent Footprint? A tent footprint is a piece of protective fabric or material that you lay under your tent that provides a moisture barrier and protects your tent floor from abrasion and punctures.