There are mantras known to help opening your chakras. And I sometimes use them:
The Root Chakra
Muldahara means MULA: Root, Adahara : support or base (red)
The sense organ that corresponds to the first chakra is smell
Element : Earth
Mantra: LAM
The Sacral Chakra
Svadistana : The dwelling place for the Self. color Orange
Element : Water
Mantra : VAM
The Solar Plexus Chakra
Manipura: the element is fire, and color yellow; Digestive fire
Mantra: RAM
The Heart Chakra
Anahata
Element: Air
YAM
mantra: Om Mani Padme Hum
Throat Chakra
Vishudha
Element : Music/ Sound
Mantra : HAM
Third Eye
Ajna
Element : Light
Mantra: Mam with emphasis on the "M"
Crown Chakra
Sahasrara
Element: Divine Consciousness.
Mantra: OM/ Silence
Here is a link to some articles where you can also use different mantras (In English) to help you in the process, and also exercices to keep your connection high
http://www.mindbodygreen.com/0-20933/7-mantras-to-balance-your-7-chakras.html
http://www.mindbodygreen.com/0-20543/7-mudras-to-unlock-your-7-chakras.html
http://blog.mindvalleyacademy.com/alternative-healing/using-chakra-mantras-unblock-energy
The Root Chakra
Muldahara means MULA: Root, Adahara : support or base (red)
The sense organ that corresponds to the first chakra is smell
Element : Earth
Mantra: LAM
The Sacral Chakra
Svadistana : The dwelling place for the Self. color Orange
Element : Water
Mantra : VAM
The Solar Plexus Chakra
Manipura: the element is fire, and color yellow; Digestive fire
Mantra: RAM
The Heart Chakra
Anahata
Element: Air
YAM
mantra: Om Mani Padme Hum
Throat Chakra
Vishudha
Element : Music/ Sound
Mantra : HAM
Third Eye
Ajna
Element : Light
Mantra: Mam with emphasis on the "M"
Crown Chakra
Sahasrara
Element: Divine Consciousness.
Mantra: OM/ Silence
Here is a link to some articles where you can also use different mantras (In English) to help you in the process, and also exercices to keep your connection high
http://www.mindbodygreen.com/0-20933/7-mantras-to-balance-your-7-chakras.html
http://www.mindbodygreen.com/0-20543/7-mudras-to-unlock-your-7-chakras.html
http://blog.mindvalleyacademy.com/alternative-healing/using-chakra-mantras-unblock-energy