Now you've had your blocked drain cleared or replaced there are a few important things you need to know to help minimise the probability of it blocking up again. Here are a few recommendations to maintaining your drains:

When you are having renovations done on your property ensure they cover all exposed pipes so no debris falls down the pipes causing a blocked drain.
Keep drains and sinks free from hair - put it in the bin
Don't flush sanitary items, nappies or baby wipes down a drain
Use sink strainers in the kitchen
No fats, oils or food scraps ought to be washed down the drain
Be cautious of clip on toilet fresheners that may fall off and be flushed down the toilet
And yes while children find it interesting to watch a toy disappear down a 'waterfall' of water, objects being flushed down the bathroom . may also cause blocked drains.
Did you know 75% of sewage overflows certainly are a consequence of tree roots blocking drains? With Browse around this site growing about one and a half times the length of the adult plants branches it is possible to reduce the potential for blocked drains by planting trees as far away from your sewer lines as you possibly can.
Your sewer lines can be found by simply clicking this Sydney Water link to Quick Check where you can obtain a copy of one's property's drainage diagram. http://sydneywater.com.au/BuildingDeveloping/QuickCheck/QuickCheckAgents.cfm
Here are the issue species according to Sydney Water