FOCCUS stands for Facilitating Open Couple Communication Understanding and Study. See http://www.foccusinc.com/.
So what does that mouthful mean? FOCCUS (for pre-marrieds and REFOCCUS for marrieds) is an inventory where couples answer a series of questions about many areas of their relationship. These two inventories are helpful because they can prompt much discussion the different areas. Normally the more you know each other and can appreciate the differences, the healthier your relationship.
Around the country, especially where there is a Community Marriage Initiative, or a Community Marriage Policy, there will be people trained to utilize these inventories. You can find a list of facilitators on their website.
My wife and I have been exposed to REFOCCUS a couple of different times since we reconciled and it has helped us grow in our relationship.