We have a holy water font next to our front door. I have had a holy water font since shortly after my conversion. While I was still living in the dorm in college, I had a plastic font attached to one side of my desk with command strips (little adhesive strips that come off without damaging surfaces or leaving a sticky residue). In other places it was hung near the door of my bedroom.
Holy water is a reminder of baptism. In the old liturgical books, holy water was used in blessings of objects and many blessings of people. I see mentioned in many places (I have not been able to find an authoritative source -- if anyone knows where to look, please leave me a comment) that holy water has the power to remit venial sins.
Whenever we leave the house we make the sign of the Cross with holy water. Do you have a holy water font in your home? I highly reccommend the practice.