SSD are much more reliable that in the distant past. I wouldn't be concerned about killing it.
If you didn't already get it, don't get REVO drives. The price vs performance compared to Agility 2 (or the Agility / vertex 3 coming out) is not favorable. Run them in RAID 0, that's what I have.
Install AH on the SSD.
Install what you can on the SSD, basically. The programs you use most, especially if they're small.
Do not bank on either having longevity, in that: HDDs fail, SSDs fail. ALWAYS MAKE BACKUPS.