I do the same as the others. Feed well a week or so before you go, a careful clean/ and water change or top up. Any lights that aren't on timers are put on timers. I close all curtains and windows and switch off any thing that may create a heat source. Any juveniles that generally require more frequent feeding are left with a reasonable supply of live food.
When you return, carry out your usual water changes if required. Do a general clean up and resume feeding as you would normally.
How long are you expecting to be away for and what species will be left alone?