Organise a direct debt/bpay payment schedule on the day that you get paid to go towards your electricity bill.
Calculate approximately how much your bill will cost on a fortnightly/weekly basis. (Based on your pay frequenc)
It is easier to pay $50 per fortnight instead of $300 out of one pay. I do this for all my bills ie phone, mobile, gas etc. and I don't have to worry about getting time to go pay bills it is all automatic