If you want to clean up more space try a program called treesize. There is a free version you can find on google that will map out your folders organized by size. It lets you easily pinpoint where you space is being used.
Otherwise you need to look into adding more disk capacity. In my opinion 32 GB isn't enough (I am barely content with 100GB on my laptop).
There are 2 solutions to this:
1) Get an external USB drive. You can buy these anywhere for pretty cheap. Just plug in the USB drive and you have another drive that you can store large files (like videos, music, pictures, etc) on (you don't usually install programs to a secondary drive like this).
These drives come in 2 types, the 3.5 inch versions are larger in capacity and generally a bit cheaper per GB, but they require that you plug them into the wall. The 2.5 inch versions are just a laptop drive in a case. The benefit here is that they are powered from the USB connection, so they are much more portable. I don't think the cost is a big issue myself. The 2.5 inch external drives range from say 50GB to 100GB on average, the 3.5 inch externals get up to 500GB or so (rough numbers).
2) Upgrade your internal hard drive. This is tricky, and usually better left to a trained technician or computer affectionato who's willing to look into software that can perform a disk to disk transfer (there's lots of it out there, but you'll need to figure out the logistics of backing up the image of your current drive and moving it to the new drive, a USB drive as mentioned in #1 is a great way to do this).
You need to look up the specifications of your laptop to know what kind of drive you have. You will probably have either:
- IDE/ATA
- SATA
The second is newer and faster. But both formats have good drives. When looking at drives the the simple common comparison points are capacity (80~120 GB is the current range of laptop drives), RPM (how fast it spins, 5400 is average, 7200 is very good), price, and, to a lesser extent, seek time (that's how fast it can look up a random piece of data).
Just get the right drive, do the transfer (or pay someone to do it for you), and voila, you've upgrade.
Personally, I think the external 2.5 inch USB drive is the best way to go for most people, I carry around 2 external 2.5 inch drives myself. A good 3.5 inch external is also great for doing home backups.