When shooting rivers, like the Liffey here, Joe suggests leaning the tripod against a wall. By putting two legs against the wall, you can extend the other to create a stable base against the floor. Sometimes a tripod gets knocked, and you don’t want it falling over and breaking, so brace it as you shoot. Avoid putting your hand at the top of the tripod near the body, though, as this will increase the risk of camera shake. Instead, place a toe on the base of the single extended leg, as this will transmit less vibration to the camera and keep your photos tack-sharp.