Meditation is the first and--in my opinion--the most basic, because you use it to get to or enhance some of the other Paths.
Trance work is the second, which includes astral projection exercises. Perhaps it's the most important, because it gets us where we go to exercise the power or obtain the wisdom that we want to.
Dancing is a Path that I personal can't use because I'm lame; but I've been told by able-bodied Pagan friends that it's great because it engages the whole self--and especially it helps you be grounded AND Elsewhere at the same time.
Binding with cords and other forms of sensory deprivation are good for helping the mind travel beyond the body's limits because one wishes to escape the tedium and discomfort of them. (I'm sorry, but even a flotation tank gets uncomfortable eventually!)
Scourging and other repetitive acts also use tedium as a release but are more stimulating than being bound or floating in a tank. (They do NOT use pain. If they're being done THAT intensely, they're being done incorrectly... )
Chanting and mantras use repetitive sound and the inherent nature of some sounds to produce altered states of consciousness.
Drugs (which normally means incense and MAYBE alcohol but NOT hallucinogens and such) variously stimulate, relax, disinhibit or otherwise change one's mental state.
And that brings us back to the Great Rite and other forms of sex magick, which attempt to involve all levels from the physical to the Divine Within at one time.
That's VERY thumbnail. Oh, and I can--and should--add that the various Paths can be used in combination as well as separately, that there's some variation from one tradition to another as to what the Eight Paths are, and that not ALL traditions have Eight Paths per se!
Bright blessings! Granny Spider