When there's a ladder leaning on a building and you walk up to it to move it, always look carefully at the top in case anyone has left any tools hanging on the rungs. When pulling a ladder away from the building to move it put your foot on the ground behind the ladder leg to act as a fulcrum. When lowering an extending ladder put it at a steeper angle to reduce the strength need to unhook the upper section from the lower one. When extending a triple extend the top section fully then extend the middle section as much as necessary. To carry a ladder first find the point of balance. Carry the ladder with it as upright as possible to reduce the weight on your shoulder. Never hold a ladder horizontally to carry it, unless there's no headroom. When carrying a ladder keep a lookout for overhead cables. If you have to lift a double or a triple onto a higher level while the ladder is extended tie the sections together. If you feel the need to have someone footing the ladder it is fundamentally unsafe. Secure it properly. A welding clamp can be used to secure a ladder to a strong gutter. If the ground is frosty put an excessive amount of salt down around the foot of the ladder to prevent re-freezing. Frost can form on the stiles of a ladder while you are on the roof and make it skate across the edge of the gutter it is leaning against. If a dog follows you up the ladder onto a flat roof you will most likely have to carry it down. Dogs just can't do going down a ladder. Monkeys are OK though. If a child follows you onto the roof leave it up there. If a 4 metre double or triple becomes worn and wobbly you can cut it down and make a perfectly good 2 metre ladder.
Bill