Some bills have payment plans based on how much energy you use. For instance the power company in my state offers a low plan based on how much wattage you use in a year and you only pay that one flat fee per month. If you are not in a room, there should be no lights on-save energy that way.
My husband and I have bought furniture from Youth Challenge and other thrifty stores. We no longer do payment plans and saved a lot of money. A two piece furniture set cost us less than $180! And it was in excellent shape, barely used and gorgeous.
Also, we find deals online for food and other items. Mommysavesbig.com and extreme couponing helps(haven't tried the extreme thing yet). When it comes to foods we try not to go too expensive but also not too cheap. We go to Dollar stores for foods that are cheaper and use coupons for other food items. Walmart and Food Lion are okay but we watch the dollar signs.
No cable. We do not have cable, but what we watch is on Hulu or other internet channels. We should not have to pay for cable. It is a luxury. I have one simple cell phone that is prepaid and it works perfectly- also a luxury.
I'm sure there are other ways to live frugally and am open to new ideas!