I'm awful about doing my dishes on time, making my bed, etc., but I clean my toilets weekly like my life depends on it. I use this:
Refills are definitely worth the price--each pack of the flushable brushes lasts a few months, and the hardcore scrubber lasts longer because I rarely have to use it. It takes like a minute to clean the toilet this way (other than wiping down the seats/rim and such) and it makes life so much easier. Cleaning a long-neglected toilet is one of the worst things ever.