C.S.
At eight months, it's definitely time to start saying no. She doesn't necessarily understand what she's doing, but she can start to learn. Like many others have said, distraction is a good thing, but won't always work. The reason she's having the tantrums, though, is that she's always gotten her way up until this point. You shouldn't be mean, but it's definitely time to be firm. Love doesn't mean giving her what she always wants. Love sets boundries. You can't spoil her with love, no, but it's time she knows that you're the one who sets the rules. You can do this. Good luck to you!