I have a 128GB SSD, and it's constantly almost full. My photographs and music collection takes about 30GiB, WoW takes 30-40 GiB, my dev projects and school work

I have a 128GB SSD, and it's constantly almost full. My photographs and music collection takes about 30GiB, WoW takes 30-40 GiB, my dev projects and school work about 7 GiB, OS and software takes 34 GiB (8GiB of that is reserved for future use), and rest 20 GiB is various miscellanous things that add up. I need 10 GiB free space to download and watch a movie, too.