I keep Holy Water in my room and use it often. You should have some at home also. Those little plastic bottles are available in most Catholic stores. Of course, there are surely lots of ways that you can get them online also.
Here is a Holy Water font that is outside the sacristy in the church of Santa Maria sopra Minerva:
When we bless ourselves with Holy Water we are reminded of our participation in the life of God – Father, Son, and Holy Spirit – through baptism; we renew our baptismal commitment; we receive grace to live it out; we also repel the forces of evil.
This, then, is a good general reminder that if you haven’t ever had your home blessed, you should call your priest and make arrangements for him to come and do it! This does not have to be a long visit; in fact, it would be best to provide the priest with the option of only stopping by briefly, which might make it easier for him to schedule it sooner than later!