New Computer has SSD and Normal HD

So I just bought a new custom built computer, and i have a SSD drive for my OS, now i've never used a SSD in my life and was wondering how i should use it properly, my friend told me it's for the OS and Programs, but i've installed close to all the programs i use daily and i have 25GB left on the SSD (acting as C:/ Drive)

Should i be installing my programs on my Normal Hard Drive? i feel like i'm going to run out of space, but at the same time i don't want to lose the SSD performance. Below is the current drives i have installed;

117GB Corsair Force 3 SSD (SATA-SSD)
977GB Seagate ST31000524AS (SATA)

I do plan on adding an additional 2-4 500GB HD's as soon as i move all the files from them to my new desktop and format the drives, any additional help, or what i should do is greatly appreciated.