Don't go over 350 kts shortly after takeoff    Simple. You're not supposed to be going over 250 kts anyway until you're above 10,000 ft (general rule of thumb, regulations in the states-i think it's different in Europe, if you're flying out of there).  Aircraft cannot fly at their cruising speed close to the ground.  350 kts at 5,000 is very different from 350 kts at 30,000 ft.  Vne (never exceed speed) changes with altitude.  You can't accelerate to the concordes cruising speed until you're reallly up there.