Depending on your mast height...
-I borrowed my buddies aluminum extension ladder.
-Then I grabbed two of those nylon strap tie downs for stuff you tie to the top of your car/truck... the kind with the ratchet.
-get a piece of wood or two to protect the top of your deck. Put the bottom of the ladder on these.
-put ladder up along mast and use tie down straps to secure to mast.
-climb up with your boat hook.
-Use duck tape to put a smaller hook made from a coat hanger.
-Use small hook to hook the halyard