Maintaining my macbook 6,1?

Hi Guys,

I have a macbook 6,1 given to me in late 2009. I recently had it repaired (new charger + new batteries).

Everything is running fine now especially after I've upgraded to Mavericks. I still have some junk file here and there to delete.

I was wondering if you guys have any tips/app recommendations to help me in maintaining my macbook battery life/performance.

I also notice that the fan can be a bit noisy when I have several large apps running, is this normal?

Help much appreciated

Thanks, yeah the repair guy told me to unplug the adapter once it gets to 90% but at the same time do not let it drain batteries.

Any apps you would recommend?