Lord Vishnu is associated with Akshaya Tritiya (Read About It Here : Akshaya Tritiya- Legends Of Origin) in most regions , and it is believed that Lord Vishnu fulfills his devotees desires on this holy day. Also, Devi Mahalakshmi is Lord Vishnu’s consort and is said to bestow her devotees with unbound prosperity and wealth when prayed to on Akshaya Tritiya. Even Lord Kubera is said to pray to Devi Mahalakshmi on the auspicious day of Akshaya Tritiya. The following is a very simple pooja that can be performed to get the blessings of Lord Vishnu and Devi Mahalakshmi.
Light a lamp in front of A photo or idol of Lord Vishnu and Devi Mahalakshmi, and place the lamp on a plate. Then, take a bowl/glass of water and put 5 Tulsi (ocimum sanctum) leaves in the water. Now, cover the mouth of the bowl/glass with the palm of your right hand. Keep your left hand on top of your right hand, and chant the following mantras 9 times :
om namo vasudevaya namah ॐ नमो वासुदेवाय नमः
om namo vishnudevaya namah ॐ नमो विष्णुदेवाय नमः
om shree shree lakshmi deviye namah ॐ श्री श्री लक्ष्मिदेविये नमः
Then take the bowl/glass of water and slowly pour it on the base of the lamp while chanting :
om namo bhagawathe vasudevaya ॐ नमो भगवते वासुदेवाय
Now take a fistful of rice and place it in a bowl. Now take few grains of rice with the ring finger and thumb of your right hand. Then chant the following mantra :
om shree lakshmisametha narayana namah ॐ श्री लक्ष्मिसमेता नारायणा नमः
Then shower the base of the lamp with the rice in your right hand. Repeat this ritual until all the rice in the bowl is over. After that, shower the photo of Lord Vishnu and Devi Mahalakshmi with flowers while chanting :
om namo narayanaya. ॐ नमो नारायणाय
Then light some camphor and pray sincerely to God that this Akshaya Tritiya should bring your family happiness and success. Then take the rice from the plate below the lamp, and cook it. This cooked rice should be distributed as prasad among the family members.