There are three different types of tools that can be very helpful in attaching tubing to spouts or other fittings. Each tool is demonstrated in the videos below. Note that there are two different sizes of tools depending on the size of tubing you are using (3/16″ versus 5/15″ tubing)
1) Line Viper
2) Maple Tech Tools Single Hand Tool
3) Maple Tech Tools Double Hand Tool
Pre-lubricate the ends of the hose and connections with sap/water. This will help make the lines seat on smoother and prevent stretching and tearing of your tubing.
Before attaching the fitting, warm the end of the tubing in a thermos of hot water, this will make the tubing more pliable.