congrats. just amke sure your power supply can handle new things. check what you have and add with its watts.
also make sure you do NOT have a HIPRO power supply. they go out really quickly and are garbage!
as above canned air is the best way to dust out a case and its fans.
you can also leave the access panel of the case off if you don\'t have a bunch of pets around and allow more air flow.
pets are a computers worst enemy. shedding on/near it will only get more junk into it. try to avoid having a computer in a place pets can get to easily. but dont lock it up inside a computer desk where it has no airflow around it.