Potential CSC problems?
 

So I bought my Z back in 2011 and I have since put about 20k miles on it and my clutch went soft and stuck to the floor, which from what I gather is pretty common around that mileage, so I took it to the dealership and they fixed it and it was covered under warrantee so I wasn't worried. It was fixed within 2 days but it does make me worry because if this happens again then I don't think it will be covered under the warrantee because if I remember correctly my warrantee is a 3 year 30,000 mile warrantee. So what preventive measures can I take to either ensure this doesn't happen again and if it does it doesn't happen for a while? Or am I going to just have to deal with this on going problem every 20k miles or so?

I thought the drivetrain had a separate, longer warranty. My '09 does. Not sure about '11.

Power train = 5 yrs -60,000.

I need to look into the warrantee more but my biggest consern is if it's going to be an ongoing problem because the warrantee is going to run out. And when it does I would like to really look into some type of preventive measures whether that's flushing the clutch fluid out or something else. I don't want to be caught with my pants down after the warrantee is up