Nothing really hogging RAM, and this is mostly for schoolwork use. usually, just Chrome (about 6-7 tabs, maybe a single youtube, 2-3 MR, some cloud sharing service, and maybe reddit), msWord, Powerpoint, other msOffice apps, iTunes, and occasionally some light gaming. I've been trying to use school computers (iMac) for anything really requiring more power.
Usually, I have about 50-200 mb of RAM free, up to about 400MB if I'm not really doing anything.
A 128 SSD + 8 RAM is something I've been trying to put into my MacBook, just trying to weigh the costs of continuing to deal with the crappy HD3000 and continuing to live with this, vs. getting a new rMBP.