Paganism- The term pagan is derived from Late Latin paganus, revived during the Renaissance. Itself deriving from classical Latin pagus which originally meant 'region delimited by markers', paganus had also come to mean 'of or relating to the countryside', 'country dweller', 'villager'; by extension, 'rustic', 'unlearned', 'yokel', 'bumpkin'; in Roman military jargon, 'non-combatant', 'civilian', 'unskilled soldier'. Defining paganism is complex and problematic because of its derogatory origin and later reclamation. Referring to paganism as pre-Christian indigenous religions is equally untenable. Not all historical pagan traditions were pre-Christian or indigenous to their places of worship. Owing to the history of its nomenclature, paganism traditionally encompasses the collective pre- and non-Christian cultures in and around the classical world; including those of the Greco-Roman, Celtic, Germanic, and Slavic tribes. However, modern folklorists and contemporary pagans in particular have extended the original four millennia scope used by early Christians to include similar religious traditions stretching far into prehistory.
Heathenism- or Germanic Neopaganism, is a modern Pagan religion. Scholars of religious studies classify it as a new religious movement. Developed in Europe during the early 20th century, its practitioners model it on the pre-Christian religions adhered to by the Germanic peoples of the Iron Age and Early Middle Ages. In an attempt to reconstruct these past belief systems, Heathenry uses surviving historical, archaeological, and folkloric evidence as a basis, although approaches to this material vary considerably.
Blót- a ritual in which offerings are provided to the gods. Blót typically takes place outdoors, and usually consists of an offering of mead, which is contained within a bowl. The gods are invoked and requests expressed for their aid, as the priest uses a sprig or branch of an evergreen tree to sprinkle mead onto both statues of the deities and the assembled participants.
Seiðr- a particular trance ritual complex. Contemporary seiðr developed during the 1990s out of the wider Neo-Shamanic movement, with some practitioners studying the use of trance-states in other faiths. A prominent form is high-seat or oracular seiðr, which is based on the account of Guðriðr in Eiríks saga. While such practices differ between groups, oracular seiðr typically involves a seiðr-worker sitting on a high seat while songs and chants are performed to invoke gods and wights.
Cyberhenge: modern Pagans on the Internet by 
The Encyclopedia of Witches and Witchcraft by 
Magical Religion and Modern Witchcraft by 
