Spice up your sex life by having phone sex with your partner. It is easy with the convenience of the cell phone. You can call them up spontaneously and if you have a secret vocabulary that just the two of you understand then the sky is the limit.
Create an erotic world between the two of you while you are on your business trip. By keeping in touch you will feel as if your partner is not far away at all.
Even if they are not that far away by adding a new dimension of communication into your relationship you will be creating a new dimension of intimacy. The phone is right there. You can call whenever you want to. Creating a special language between the two of you will be half the fun. Start connecting feelings with physical moments together and use these in your new language.