A couple of things you may wish to consider in the future.
1.
Make sure you clone your drive--to an External. You say you are "new" so let me tell you nothing solves problems easier than having "where you were" backed up before you decided to "delete that strange file" or "OMG . . . MY VOLUMES CORRUPTED" or what have you.
Time Machine should do this. WAY back it use to not make a "bootable clone"--a clone you could actually boot your computer from. So some paranoid users such as myself used
SuperDuper! or
Carbon Copy Cloner. I
believe that has changed.
2.
Boot From Clone:--the reason for this is so you can run
Disk Utility periodically to make sure you volume is not corrupted--this can certainly happen after "hard reboots" and the like. The program--in your
Utilities folder--cannot repair a drive that it is booted on. Since you have
Mountain Lion, you should also have a "Recovery Disk" you can also boot from which, I believe, does the same thing--I have not tried it.
3.
Maintenance Scripts:--have you run them? Do you know what they are? Two good programs clear things like logs files and the like and can help. I long ago purchased
Cocktail which does a very nice job. There is, however, the free
Onyx which is also fantastic. Both allow you to tweak things you may like tweaking.
4.
Do What Delta Mac Suggests:--particularly with regards to memory. The good news is memory is rather cheap. I have had good experience
Data Memory Systems; others can recommend other vendors. The point is while Apple reports the thing supports 4 GB, you can go up to 6 GB as
Delta Mac notes. IF you have a 2 GB chip--one chip--then another 2 GB is ~$30 and a 4 GB is ~60. If you have two 1 GB then the upgrade is a bit more expensive--either ~60 for 4 GB total or ~60 for the 6 GB. The extra memory, especially for
Mountain Lion, is a big help.
--J.D.