I am cars newbie and have Cultus 2007 since last year but I think I am maintaining to its optimum condition. Can you write me points what should I be looking for if I go for maintenance?

What I usually do.

- get it washed (monthly)
- change engine oil
- feed it tap water (monthly)
- fix/change brake shoes (when they start to bark)

What else should I do and how frequent?