Holy Water: I'm not sure how exactly accurate it is, but it certainly can't hurt.
Step 1: Get water. (duh. thanks, book.)
Step 2: Find a clean vessel in which to store the water while it is being blessed. A well-washed glass or metal bowl will do just fine.
Step 3 (optional): If you want, add a few pinches of salt to the water. However, the salt must be “exorcised” before it is added. But I don’t think you have any exorcised salt (Idek what that means alksjdklfjas), we can just move on to the next step. If you have exorcised salt… damn girl, give me some. Well done.
Step 4: The actual latin blessing bit.
(fyi, typing in latin is hard)
Deus, qui ad salute humani generis maxima quæque sacramenta in aquarum substantia condidisti: adesto propitus invocaionibus nostris, et element huic, multimodis purificationibus preparato, virtutem tuæ benedictionis infunde; ut creatura tua, mysteriis tuis serviens, ad abigendos dæmones morbosque pellendos divinæ gratiæ sumat effectuml ut quidquid in domibus vel in locis fidelium hæc unda resperserit careat omni immuniditia liberetur a noxa. Non illic resideat spiritus pestilens, non aura corrumpens: discedant omnes insidiæ latentis inimici; et si quid est quod aut incolumitati habitantium invidet aut quieti, aspersione hujus aquæ effugiat: ut salubritas, per invocationem sancti tui nominis expetita ab omnibus sit impugnationibus defense. In Nomine Domini Nostri Jesu Christi filium tuum, qui tecum vivit et regnat in unitate Spiritus Sancti, Deus, per Omnia saecula saeculorum. Amen.
You can also, like Jay was saying, sanctify water by immersing a holy relic or religious object into it (or, depending on the relic or object, just touching the surface of the water can be enouh). For example, an object such as a blessed rosary, Saint Benedict coin, etc. Jay, being a catholic school girl, probably has a rosary, which is damned convenient for her. I have to do it the hard way.
Good luck, and I hope that made sense. (I have the english version of that latin, if you need it. But most people tend to use the latin. *shrug*)
Love you, greta bear. <3
LOVE YOU KAY BEAR
I actually do have exorcised salt. For no reason in particular.