An inexpensive nylon-bristle brush and a few small "acid" brushes that are sold for applying soldering flux can make great tools for spreading glue. Clipping off about half the paint brush bristles will make them stiff enough so they won't slop glue around on board edges or mitered joints.
Be sure to frequently check the air filters on your tools. Clogged filters can choke an engine and many filters can be cleaned and reused.
If your planning a backyard pond, locate it where it is unlikely to attract unattended children. Check local safety ordinances to determine if a fence is required for the specific depth and size of your pond. Check local building ordinances for depth and safety restrictions and permits. Equip outdoor outlets with a ground-fault circuit interrupter. Unplug the pump before cleaning the filter.
You can square up a wall before raising it by measuring from opposite corners. Assuming that both the top and bottom plates are equal in length, and that both ends are the same, the wall is square when the diagonal measurements are equal. Adjust the wall as necessary, then keep it square with sheathing or with diagonal braces before raising it.