Have breakfast, lunch or dinner together!
Have a romantic date: let each of you set a table with candles or order a meal in a secluded restaurant with Wi-Fi. Use skype and webcam for face-to-face communication. Be sure to order or prepare the same dishes and have the same music playing in the background if possible.

Take photos together!
Agree to take photos separately so that you can easily combine the two pictures later, even if you're not a Photoshop guru. Photos from the internet can be a great backdrop for your images and inspire you with interesting ideas. Send each other photos, discuss and have fun.

Reading together!
You will need an interesting book. Every day, you can read to each other before going to bed, while discussing the story. The main thing is that both of you should enjoy the book, so choose proven books or bestsellers so that the activity is not boring.