This is a great question. However, we must be aware that these religions are broad and there are differences of opinions. Sometimes these difference are great. So, I will have to limit myself to general points.
In Judaism, salvation is an extremely difficult concept. Some tie salvation to the land and the establishment of peace in the land of Israel. Others still wait for a messiah that will have a Davidic style monarchy. The basis of all of these views of salvation is based on God's promise to his people.
In Islam, the way of salvation is simple to understand. Your good deeds must outweigh your bad deeds. You can think about a scale and if your good deeds are greater, then you can go to paradise. Otherwise, you will spend it in hell. So, we can say that in Islam, there is a works mentality when it comes to salvation. The other way to gain salvation is to die as a martyr. If you give your life, then you will be ushered into heaven.
In Hinduism, there is an emphasis on reincarnation. However, "heaven" is to break this cycle and there are a few way to do this, which is called Moksha. First, you can gain Moksha by performing religious ceremonies and good deeds in a selfless way. Second, you can use your mind to gain insight through mediation and come to understand the universe. Third, you can use mediation and yoga techniques.
Regarding Islam, I would like to add as under to the above answer:
In Islam, even earning your bread and butter honestly, having a marital relationship for continuity of the human race and all other deed that conform to the Islamic Doctrine are counted towards the good deeds and help you in achieving salvation.