Greydog

Hope this is the right place for this.
I keep beating the synchros on the 1-2 up-shift and occasionally on the 2-3 up-shift.
While I don't really know the history of the car, it has only 35k miles on it and, mechanically, it seems pretty straight.
I'm wondering if I should re-build the clutch slave cylinder or learn to be more gentle in the shifting department.
Thanks for any suggestions.