This is a difficult one for me to answer within the bounds of my tradition because I also have extensive training in the esoteric arts. I tend to be very pragmatic about protection and use whatever will work. That being said, I think we have quite a bit though, evidenced both in the surviving lore and in folk practices that point to an endless array of means to ward and protect.
I always start my students off with basic exercises like grounding, centering, cleansing, and shielding. I think regardless of tradition, these really are fundamental and certainly in a cosmology that has a dominant image of the world tree, the idea of rooting oneself energetically for stability in one's world is not foreign. There's surviving evidence of warding songs, protective galdr, and many of the snippets of lore dealing with runes point to powerful protective (both defensive and offensive) functions. There are dozens of charms for protection and the warding off of malign influences, most notably the nine herbs of Woden.
While hoodoo is strongly associated with the south, in reality, i.e. in practice, it's not that different from anglo saxon and germanic folk workings. My favorite charm is a witch's bottle, but then one also finds shoes (sometimes real shoes, sometimes very small), and other items inside the walls of houses up to the 19th century--as a protective charm to ward the home. I don't discount magic like this. I think in the right hands and done mindfully it hits a groove and can be quite effective.
Then of course we have the idea of a nithstang, a pole carved with runes at which a horse is sacrificed and the head of said animal put atop the pole to direct its spirit energies against a foe. Egil's Saga talks about this. This has been adapted in modern day to include cyber-nithstands and such, all sans horse.
I don't underestimate the efficacy of proper sacrifice to the Powers though, be it Gods, ancestors, or other helping spirits. There is a section in Kormak's saga wherein a seidhr worker is found sacrificing geese to ensure protection for the hero. She chides him saying that if she'd been able to complete the working without disruption, he would have been assured of protection and success. Obviously at times of great and grave danger, one could petition with offerings.
All of the above is just -- at best--the tip of the iceberg. I personally keep my house shielded, maintain good personal shields, cleanse cleanse cleanse energetically as regularly as possible and pay attention to my devotional relationships. I connect with my ancestors regularly and my military dead and trust their counsel as to when things are poised to go awry. I very much believe an ounce of prevention is worth a pound of cure.
So the question may be asked: what does all this have to do with devotion? I believe the answer is more complex than one might think. Firstly, if one is energetically gunked up, or constantly fending off malignant crap, it can impede and impair what many of us term 'signal clarity,' the ability to communicate and sense/hear the Gods effectively. This is one of the reasons it's so important to keep free of miasma: it damages our clarity in relationship with the Powers. Furthermore, it can make it difficult to function if one goes out without shields and filters and one is psychically sensitive or open. You wouldn't leave the house without clothing; neither should you leave without shielding.
Secondly, there are always people in our communities who are small minded, jealous, nasty, petty, and cruel. These people, lacking in their own relationships with the Powers, or simply threatened to see yours, will not hesitate to gossip, attack, slander, and in some situations throw malignant shit your way. All of this can be a burdensome distraction to devotion if we let it. The solution: don't let it.
Never allow small-minded people to interfere with your devotional relationships. Without proper cleansing and wards, it can be troublesome to fend off the malignancy and nonsense spewed forth by some folks -- even if they aren't consciously working against you energetically, thoughts and feelings have an impact and sometimes one as effective as a 'curse'. Just don't let them. By taking a bit of preventive care toward one's wards and shields, the belly-aching, whining, and vitriol-spewing of those less enlightened parts of your community are rendered utterly ineffective, just as they should be and in fact are.
The purpose of all of these protections is to keep yourself clean, unbothered, and to allow yourself to focus on what's really important: venerating the Powers.