"How was your day?" - very important question.
Always ask your partner about this. Little things like this show that you really care about what happens in the life of your significant other.

A long journey is made up of little things.
Does your partner like chocolate or maybe chips or gum? When you are in the store, just grab for him what he likes, it's not difficult. But such small surprises show that you always remember your loved one.

Say "I love you" more often.
These three words will never get old. Seriously, you can never say them too many times.

Answer each other's calls and SMS.
Don't hang up or switch to another line for a "more important" call. If your partner needs something - no matter what - it should be a priority for you.

Love each other unconditionally!
Sometimes it's really very simple