Moksha / Nirvana / Samadhi / Liberation / Mukti

http://en.wikipedia.org/wiki/Moksha
Moksha - Comes from word Moha infatuation or delusion and Shaya - Finish
Nirvana as Moksa
http://en.wikipedia.org/wiki/Nirvana#Nirvana_as_Moksa
Samadhi
http://en.wikipedia.org/wiki/Samadhi

Simplest way Of attaining True Liberation
Chapter 8. Attaining the Supreme

TEXT 7

tasmat sarvesu kalesu
mam anusmara yudhya ca
mayy arpita-mano-buddhir
mam evaisyasy asamsayah

SYNONYMS
tasmat--therefore; sarvesu--always; kalesu--time; mam--unto Me; anusmara--go on remembering; yudhya--fight; ca--also; mayi--unto Me; arpita--surrender; manah--mind; buddhih--intellect; mam--unto Me; eva--surely; esyasi--will attain; asamsayah--beyond a doubt.

TRANSLATION
Therefore, Arjuna, you should always think of Me in the form of Krsna and at the same time carry out your prescribed duty of fighting. With your activities dedicated to Me and your mind and intelligence fixed on Me, you will attain Me without doubt.

PURPORT
This instruction to Arjuna is very important for all men engaged in material activities. The Lord does not say that one should give up his prescribed duties or engagements. One can continue them and at the same time think of Krsna by chanting Hare Krsna. This will free one from material contamination and engage the mind and intelligence in Krsna. By chanting Krsna's names, one will be transferred to the supreme planet, Krsnaloka, without a doubt.

Can a person in Samsara attain mukti
Chapter 3. Karma-yoga
http://www.asitis.com/3/index.html
Chapter 5. Karma yoga--Action in Krsna Consciousness
http://www.asitis.com/5/index.html
Chapter 18. Conclusion--The Perfection of Renunciation
http://www.asitis.com/18/index.html
http://harekrishnainfo.blogspot.com

Though
A Krishna Devotee Automatically Gets Liberated (as free supplement)

Six types of Liberation

1. sayujya, merging with the body of the Lord (means merging into the Brahman effulgence of the Lord.) – SB-1.9.40
2. salokya, -residing on the same spiritual planet as the Lord (means that after material liberation one is promoted to the planet where the Supreme Personality of Godhead resides) -SB -2.7.49
3. sarupya, (means attaining a four-handed form exactly like that of the Lord.) – SB – 2.7.49
4. sarsti and (means attaining opulences like those of the Supreme Lord,) -SB – 2.7.49
5. samipya (means remaining an associate of the Supreme Personality of Godhead) -SB – 2.7.49
6. vimukti (Special mukti) -When after liberation one is situated on the platform of prema-bhakti, one is said to have achieved vimukti, “special mukti.” – SB -4.8.61, SB -10.9.20