This is a interesting, and quite difficult subject.
I think deeply profound spiritual experiences are very intimate, so even if you get shared some via text, and even via oral speech, you might not grasp the fullness of it. I will not share those I consider most intimate to myself, but I'll tell you this:
There are several ways to get experiences such as these: in a dream; by ritual and, perhaps, intoxication; by doing great deeds in nature; by lighting fires.
From dreams, I have only seen a word written in a paper: WOTAN. But it is known (or rather believed, if you prefer) that the Gods speak in many ways to people in dreams, from the Morpheus of the Greeks to signs ("A raven came to me / spoke to me in a dream", Ensiferum, From Afar). Even in games we see this (Medivh's message to Thrall in Warcraft III, for example).
You can trigger dreams in several ways: from personal experience, I know taking noopept makes that effect; I also know that sleeping on daylight will make you dream (Dreams I often remember after waking up are usually after daylight, especially when I go to sleep at dawn). There's a medieval manuscript that declares 9 holy plants from Odin, one which is Mugwort. According to Erowid, people who have smoked it before sleeping get deep and strange dreams, but I have not tried this myself.
By ritual and intoxication you can get a different grasp on things you see, but I do not intend to promote degeneracy, so I'll only tell you to not abuse substances, as not only it is disrespectul for the plants and spirits, but also because the price to pay is not something you'll like.
By doing great deeds in nature, like climbing mountains or trees, and perhaps hunting, you'll do things your ancestors did. Read this article from Patheos, which has something to do with it: Meet the gods on their own terms, not yours. http://www.patheos.com/blogs/pantheon/2015/12/meeting-the-gods-on-their-terms/
Last one, but not the least, is self explainatory.
Do not despair, for there are few who get to see manifestation of the Gods, and some who look for them will spend all their lives without seeing them, while others will witness them in their true form and full power, and will either go mad or get destroyed by the experience (look at the myth of Semele). If the Gods show themselves to you, it has already been fated; in the mean time, forge yourself after them and reclaim the divinity within yourself, for this way everything you do will be a meaningful, spiritual experience.