There is a relatively new land route opened between India and Myanmar and it is getting popular by the day. It is also significant because amongst the other land borders India has with its neigbours, this one might yet turn out to be the easiest to cross, less expensive and fewer bureaucratic hurdles. It also the gateway between southeast Asia and India completely avoiding China. The border crossing is at a place called Moreh in the north eastern state of Manipur and across the border is a town called Tamu in north west state of Saigon in Myanmar. It is not really a sophisticated crossing so it is necessary to carry proper documents, visas and permits before embarking on this journey. I haven't been on this route myself yet and I am currently planning to cross into India from Myanmar. I hold an Indian passport and so should be slightly easier for me to do it.