thrifty -
careful and diligent in the use of resources
wasteful laying waste; "when wasteful war shall statues overturn"- Shakespeare
provident providing carefully for the future; "wild squirrels are provident"; "a provident father plans for his children's education"
frugal,
sparing,
stinting,
scotch,
economical avoiding waste; "an economical meal"; "an economical shopper"; "a frugal farmer"; "a frugal lunch"; "a sparing father and a spending son"; "sparing in their use of heat and light"; "stinting in bestowing gifts"; "thrifty because they remember the great Depression"; "`scotch' is used only informally"