What upgrades can i do?

Hello there!

I'm new to the whole mac business!, I've always been around Mac's but never personally owned one.

I've had an iPhone.. etc etc and I currently own an iPad 1st gen.

But now I decided to purchase a Macbook off of ebay! and what a deal it was if I say so my self!

Late '06 macbook.
Storage - Fujitsu 200 GB
Memory - 2 GB
Optical drive - Matshita DVD-R (read and write)

And that's it so far! it's the 1.83GHz Processor!

Now I'm just wondering what kind of upgrades I can make to it in order to speed it up, but also perform well when dealing with multiple tasks and having multiple windows open.

I use iTunes regularly, also I download and stream music/films very often and soon to be using photoshop on the macbook!

Any help would be cool!

Thanks a lot!

Damien

 

Thanks very much for the help!

I'm currently running SL 10.6.8 and it's a real smooth OS, really enjoying it!