All you need to do to receive these tokens is to hold ethereum in your personal wallets(coinomi, metamask, Myetherwallet,etc) or on your exchanges which are supporting the fork(binance, okex, Idax,etc)
I guess exchanges supporting these forks are going to credit the new coins to your account, but how will someone claim the Classic Vision and the Nowa fork from wallets where you have the private keys? In the past phishing websites popped up after every major hardfork to get acces to your funds, I think this time it will be the same. It would be nice if you could do a little update how to be safe with these two forks.
On the other hand thanks for the update on these forks, I knew about the Constantinople fork, but the other two are new for me.