That's correct, you want your most used programs on your ssd and less used programs on your HDD. I usually put all of my programs that I use on my SSD and a few games that I play the most on my SSD, but it depends on how much space you're limited to. You want to leave a little space on your SSD or else it starts to slow down. You don't need to put all of your steam games on one drive either. You can have some steam games on the ssd and others on the HDD. I use mklink to do that. You can look it up, you basically just use mklink in a command prompt to make a "shortcut" folder where the games are and that links them to the HDD.
OK ... first off I don't play games ... so that is not an issue.
I had read on a few forums that keep OS only on a HDD (and nowSDD) was a good way forward as if OS needs install you can quickly apply Ghost image and be back running quickly.
Should I look to partition the SSD and keep OS only in one partition and frequently used program on the other partition.
My main use is photoshop editing & video editing .. and general email, & MS office apps