I agree it is a world of IMs and emails but if you want to be thought of as being romantic, then one of the best things to do is leave hand written notes in unexpected places for your partner. Everyone would love this and it would definitely make your partner happy
Make sure it is well crafted, it could be about expressing your feelings to remind them of your love or a joke just to make them laugh. The thought is what counts and it will help in bringing both of you closer together.