I started with manual and have been driving them for over 20 years. I still kill it now and then. I've not killed a clutch in almost 20 years.
The thing that kills clutches is slipping them. What kills transmissions is hammering them. You have to go for the middle ground.
The secret to taking off is giving it just enough gas to get rolling, and make sure your foot is off the clutch when you give it more gas to really get moving. Think of the clutch as what gets you moving to a fast walk. After that, your foot should be off of it until the next shift.
You should be off of the power when you shift, giving just enough throttle as you ease off the clutch pedal, to make a smooth transition. A proper shift should neither push you back in the seat, nor slow you down. The clutch should be slipped very little, if at all during the shift.
My fiance has also been driving manual cars for over 20 years. She was not taught properly, and would get frustrated if I tried to correct her, citing the years of experience. She averaged a new clutch about every 25,000 miles. I am not exagerating, she really did. She slipped it the entire time she was in 1st, and slipped it heavily at every gear change. When I started talking about getting a Miata, I got her to agree to let me "unlearn" her, and she does great now. Took knowing I would not allow her to drive it if she did not learn though. There was much wailing and knashing of teeth though for a few weeks there...