I put into a savings account fortnightly:
$140 for phone/mobiles, internet and foxtel (would only be $90 without foxtel, and only $75 with one mobile, not two)
$45 for electricity

That way we aren't caught out with huge quarterly electricity bills, or a huge chunk of one week going to telstra. It especially helps on the unlucky months where both telstra and electricity are due within the same two weeks