Even calling during his or her work time is also a gesture that will definitely spice things up for the two of you in spite of the distance.
Then send the next four words through a chat application like Viber, Whatsapp or i Message.
Continue doing this until you have sent the whole message to tease and excite your other half.
This can totally derail your conversation towards a naughtier territory. Throw in some printed photos of you or the sexy you in a revealing bikini or show off those ripped abs.
You can even add in a memento from a restaurant that you just visited or a postcard from a recent country that you went to.
Using a video call application, such as Skype, you can both set a date and time to watch the same movie together.