There aren’t any fancy tricks to keeping your tree looking good through out the holiday season. The key is water. When you’re ready to put your tree into the stand, make a fresh one inch cut on the bottom of the trunk. Most varieties will sap-over the cut area and not be able to take up water if allowed to dry out, so the fresh cut when you get it home is important. Once it’s up, keep it watered. The trunk should be submerged in water at all times and never allowed to dry out. And according to the University of Illinois Extension, aspirin or other tree preservatives aren’t necessary; just keeping the tree watered will keep it fresh for at least a month.