Methods Of Yantra Puja
Arrange all items of blessings after having a bath in the morning with pure mind and soul.
1. Panch Amrit(Milk, Ghee,Curd,Sugar, honey) and also gangajal water should be offered to the yantra.
2.   Sandalwood paste or chandan must be offered to the yantra<br />
3.   The Sadhak must keep in mind the particular Ishat(mantra) while performing the puja. One should take flowers in both hands and offer the yantra while reciting the Beeja mantra.<br />
4.   Unbroken rice or white flowers should be offered.<br />
5.   Incense sticks and diyas or lamp must be lit with the chanting of the aapropriate mantra.<br />
6.   Fruits, betel nuts and betel leaves are to be offered.<br />
7.   Place the yantra in front of your isht dev and also resepctive God of yantra and start chanting the mantra of respective yantra indicated at least for 11, 21 or 108 times. 

 Bhuvaneshwari –

Bhuvaneshwari means the Ishvari (the sovereign, the queen, of the total existing phenomenal world)

Bhuvaneshwari is Gyan Shakti, at the time when Brahma, Vishnu and Shiva got involved in their quarrel they were dominated by ignorance (agyan) and Bhuvaneshwari as Gyan shakti, showed them their real self.

Through the worship of Bhuvaneshwari the divine plan is realized and the illusionary nature of maya becomes the play of the divine lila.This realization brings about a change in both the emotions and the body chemistry- a change in consciousness and awareness.