Bagalamukhi Yantra along with its Mool Mantra is considered very effective medium to fulfil Bagalamukhi Sadhana.
ॐ ह्लीं बगलामुखी देव्यै ह्लीं ॐ नमः॥
Om Hleem Bagalamukhi Devyai Hleem Om Namah॥
Ashtottara Shatanamavali of Bagalamukhi
information on Goddess Bagalamukhi
list of Bagalamukhi Mantras
10 forms of Shakti