Not Enough Space

...  in my computer, that is. I've been having issues with my computer for the last month especially now that I only have around 30% available space on my HD to work with. This afternoon I tried to do a little work on my photos and had PS and LR open at the same time and it just didn't have enough RAM to complete the tasks. It's so frustrating, especially with the kind of stuff I do on it. I edit a lot of photos, do layouts for a few friends and of course do my digi scrap stuff as well and these are all ram hogs! To think I only have 512mb to play around with...ugh. We're going to the mall tomorrow and I'm going to check out how much it costs to upgrade... until then its just one app at a time for me. (sigh..)