Nature spends decades putting wood together into a tree. Then we take the tree from the woods, saw it into smaller pieces, dry it, and saw it into even smaller pieces. Finally, we begin to glue these smaller pieces back into larger pieces, trying to obtain the shape, size, and other properties that we want rather than the properties that the wood had when it was in the tree. Actually, this process of putting wood back together usually works out fairly well, but there are times when things do not go right. This article discusses the basics of gluing wood—requirements, good practices, and problems to watch out for.