I absolutely love The 5 Love Languages. We learnt about it in our pre-marital course and it was life changing! We were given Life Promises for Couples by Gary Chapman as part of a wedding gift, and so each morning we have been using it as our daily devotion together. It only takes a few minutes, but it is such a lovely way to start our day on a positive, encouraging note and it really brings us together.
Each day has three verses from the Bible and opposite there is a short write up related to these verses, and relevant to daily life; communication, love languages, forgiveness, patience etc.
You can buy it from Exclusive Books here.