My experiences with these stocks caused me to get away from individual stocks ... I now invest in low cost broad market index funds along with inflation protected treasury funds (composed of short/mid/long term maturities).
I never owned PCLN, I guess that would hurt even more. The coulda woulda shoulda factor is enough pain.
Ditto on avoiding individual stocks. I invest in and trade the Russel 2000. Makes life easier, avoids stress.