Wanted to post up a thread for people who want to save space on the more affordable, common, but smaller ssds. I just got my rmbp with 16 gigs of ram and 512 ssd. I wanted to save as much space as possible and thin out lion as much as I could. 1) I started by attemtping to do a custom install of lion to thin out languages and printer drivers. Unfortunaly with lion this feature is now grayed out. It appears the day of custom installs is over. Wish I would have known this as it would have saved me time initially. 2)Next I looked at my honest usage and only installed "needed" apps. 3)Signed up for iTunes match. This made it possible to only stream music to my mbp and not have to download any music at all. yes it actually streams to macs even though it doesn't to ios devices (yet). I have an imac where i keep actually copies of my music in my itunes library. 8gigs saved 4)I used "clean my Mac." it's a paid program that removes unneeded language files from apps only. It also cleans out unnecessary junk and code from apps along with cache ect. 1+ gig saved and counting. 5) used a free program called "omni disk." this let's you scan your whole drive and find out what is using your space. I was able to remove printer drivers, and voice files (there is only one preinstalled). Voices are used for people who have potential disabilities and need the things on the screen read to them. 600+ Mb 6) I turned safe sleep off and cleared its storage usage. This function writes all the info from your ram onto the hd. It's used so you don't lose your work when ur battery fully dies either while using the computer or its asleep and runs out of battery. The computer will sleep and wake much quicker no matter the type of hd used when it's turned off because it doesn't need to write or read this info from the ram/hd. I make sure my work is saved constantly and never close the lid till I'm sure my work is safe as habit anyway. Also i always have my charger. Google search for their terminal codes on how to do this. It can be reversed if you change your mind. 16gigs saved. 7)I used "monolingual." It's a free app that clears language files system wide that may be unneeded. Be very careful with this app and your language selections. Read the readme file upon downloading and before use. 2.5gigs saved 8)Turned off time machine internal snapshots. When time machine is turned on it takes quick snapshots in between actual time machine backups. All this info is saved to your hd and builds up over time. I do regular and consistent backups externally so I don't need time machine doing this on top of that. Google search for terminal codes. Reversible if need be. Consistent savings over time. 9)I used xslimmer. Its a paid with free trial app that also removes language files from apps only. I did find a few programs that could be slimmed down that "clean my Mac" missed. 50mb saved. I saved almost 30gigs of ssd space and prevented further filling of my drive by taking these steps. I have no issues what so ever with my Mac and ran into no problems when running these apps/terminal codes. I'm not responsible for any negative effects you may have by following these steps, and as always, back up your data before you go tinkering! Enjoy your free space!