The most important thing for any computer is consistency. Whether this be climate or airflow, rapid changes to the environment will wear on parts much quicker. 

The best solution here is usually the simplest: Make sure your computer is clean and has adequate airflow so it can vent heat. Wherever possible allow air to circulate through the case. If you constantly hear fans spinning fast in an effort to cool your computer, consider moving it to allow air to flow easier. Stacking things around the case can also impact airflow like stacks of documents, books, or bags. Keep in mind fans may be on the front or back, or even the bottom in some cases. 

Additionally, moisture and dust can also play a part in damaging your computer – If you notice dust building up on vents it may be time to clean with a dry microfibre cloth or compressed air. (Both available from Officeworks or similar office supply stores) Australia’s natural heat and humidity can wreak havoc and in the worst cases short circuit electronics if conditions get particularly bad. 

Finally, try to avoid moving the computer around or jostling it. Over time, cables and components can come loose and parts can be damaged if bumped a lot or dropped.