I just came up with an idea of how I might remember how to spell this word. Why not use the meaning of the word to help us determine how to spell it? To me, variety means a selection of different options. Please observe, this word has three different vowels. Nothing repeats. We have an A, I, and E. This is a variety of vowels: vArIEty We’ll see if this helps.
If you have a better idea on how to spell this word, please feel free to share it. Thank you.