Daily prayer is always a good idea. (It's part of my daily practices, for example.) It won't do quite the same things as a protective ritual, but it'll benefit you a great deal in times like these. Be sure to ask for protection against evil and for clarity of mind.
I recommend, if you aren't an occultist, combining prayer with study of holy books -- for example, if you're a Protestant Christian, read a chapter of one of the Gospels every day and then pray. That'll help you attune your mind and spirit to the Divine.
Re: Etheric / astral disturbances
I recommend, if you aren't an occultist, combining prayer with study of holy books -- for example, if you're a Protestant Christian, read a chapter of one of the Gospels every day and then pray. That'll help you attune your mind and spirit to the Divine.