Hitchcock's "The Birds" is my earliest memory of movie terror. I still cringe when I have to walk by large flocks of noisy birds. Two other memorable scaries were "The Other" where the surviving twin took over the dead twin's identity (you weren't sure who was who till the end) and he carried around his dead brother's cut off finger. The other was an episode of Night Gallery or one of those where the assistant in a tailor's shop puts an enchanted gold suit on Hans, the mannikin with the cracked head, and he comes to life. I still see that cracked head in my nightmares some 20-30 years later. My big sister warned me where all the scary parts in Jaws were so it was years later before I actually saw them.