Take your pick:
To Moon Bless anything you basically just have to lay it out somewhere safe where the moonlight can fall on the item and leave it overnight. Works best on a full moon, but as long as you can see the moon shining, any night will do.
Ditto Sun Bless ? just leave out in sunlight. The brighter the day the better (HA! In this country).
You can bless water to use on other items. Just find a suitable container (I like fancy but clear glass bottles with corks, but that is personal preference) and fill with tap water. Then leave the bottle in the Moon or Sun as above.
Earth Blessing. - You bury items in the earth. Wrap them in bags or material first, preferably of a natural material like cotton and then bury for a day or too.
Air Blessing ? you use a smudge stick (basically a bundle of incense sticks tied together, usually sage) and waft the items through the smoke.
Fire Blessing ? pass items through the flames of a fire, not advised unless you have asbestos fingers
Water Blessing ? see note above about how to bless the water, then use that to wash the items.
There are loads of others ways too, but these are some of the commenest. You will find something you are happy with. Go with your instincts.