Get good quality bulbs or ones specifically designed for that use. We put regular CFLs in recessed lighting and they have lasted for years. Still too early to give statistics since none have burned out.
I believe I’ve seen you post on these threads often enough to be appointed as the local CFL apologist.
So - do you leave yours on all the time?
Or do you have some sort of power conditioner on your house to keep the voltage and frequency constant?
Like Incandescents. With a coupon, I got a 4-pack for $0.59 at Target the other day.