Nobody wants to spend time scrubbing toilets, but you also don't want to subject guests (or yourself) to a grimy bowl. These DIY pods are an easy way to keep your toilet clean without a lot of work. Mix together bicarbonate of soda and citric acid (available almost anywhere) then slowly add in dish soap until you get a consistency similar to dough. Fill an ice cube tray (silicone works best) with the mixture and let it dry for a couple hours. Pop the "pods" out and put them in a jar in your bathroom.
Then your guests, or you, can just drop one in after they're done and the pod takes care of cleaning the bowl. These dissolve pretty quickly so you can drop one in after you're done but before you flush, wait a couple seconds and then flush. Or you can drop one in after you flush, leaving the toilet ready for the next person. While these pods will keep your bowl looking good, you'll still need to do a deep clean every once in a while to clean under the the rim and the outside of the toilet.
DIY Toilet Cleaning Pods [Nifty (YouTube)]