Unplug the table saw motor's power cord from the electrical outlet.
Unscrew the bolt holding the blade to the saw underneath the table, using the wrench. Slip the blade in the protective case that came with it, or wrap in an oiled cloth and place in a drawer in your workshop. Blades left in saws are potentially dangerous, since the teeth are exposed above the table.
Remove sawdust and wood chips from the surface of the table saw and the saw itself using a whisk broom.
Oil the saw motor with machine oil according to the owner's manual of your particular model. Generally, a few drops on the blade bolt and other moving parts will be sufficient.
Cover the table saw with a heavy tarpaulin to protect the toold from moisture, dust and dirt.