Everyone does it a little different. Here's our routine:
Leave the electric on. AC at 90 deg. (our bill is only $13/m) High heat is not good for furniture and art work. Naturally, close all window coverings.
Leave the refrigerator on and put some cases of water or whatever in it so it has something to work on. We were told it's harder on a refrigerator to turn it off and on than leaving it on. Turn OFF the icemaker.
Turn the water off outside.
Do the oil thing for drains and saran and a little bleach in the toilet.
Do a little oil in the garbage disposal and dishwasher, also.
For a house, you'd have to set out a LOT of buckets of water to make a difference. We did that with our RV but not the house.
Honestly, for only two months you won't have any problems if you forget to do something.
Next time plan to leave for high country in June and July and come back for the monsoon light shows in August. :) It'll be a little cooler, too. We're enjoying the cool White Mountains of AZ right now - along with many, many from the 'valley'.