When you're preparing a document to be printed but find that just a few lines spill over onto the last page, you can save paper by optimizing your document to fit on the fewest pages possible.
One way to do this is to reduce the font size of the text, but print that's too small can be too hard to read.
Instead, try adjusting the margins (either left & right or top & bottom) to reduce the white space surrounding the text.
Watch one of these short demos to see how easy it is to be thrifty: