Well it depends on what the definition of no touch is. For me, no touch means no playing with your pussy or clit but you can play with your breasts, bottom and grind, a bit at least. (’Strict no touch’ means you can’t do any of those)
So combining what you can do with watching porn and browsing tumblr is a great way to keep desperate. I personally love knowing what a sub is watching, so a great idea is setting up a secret shared tumblr just for the two of you and posting the videos and posts that turn you on the most. It leaves you absolutely no hiding place, which is exciting for both of you.