The number one way to increase the life of your trampoline is to disassemble it and store it out of the elements during the winter or during long periods of disuse. Most trampolines are not warranted against damage due to weather. You will also need to disassemble it if you are moving as transporting an assembled trampoline is dangerous and difficult. Using gloves during disassembly can help protect your hands from getting pinched. Have designated containers for storage/transport available, and keep the springs and net somewhere safe.
Look underneath the trampoline and locate the straps coming out of the frame pad. Loosen and un-strap them.
Slip the now free frame pad off of the trampoline.
Wearing gloves, pull the top hook of one of the springs up and out of the hole in the top of the frame. Then remove the bottom hook from the mat's V ring.
Remove the spring on the opposite side of the trampoline next. Then remove one spring from halfway between each of the two already removed springs. Continue removing springs from halfway between already removed springs until they are all off.
Pull apart the frame at each joint. You may need a second person to help you with this. Continue breaking down the frame until all sections are disassembled.