If you are going to be living in London you should be ready to use the public transport. It is not only the most affordable way to go to one place to another, but also the most efficient one. You will need a oyster card to use this method of transportation (do not forget that you can apply for special oyster card as students discount, this can save you a lot of money!). Another thing that you should keep in mind is that you will never get lost in this city thank to your smartphone. You can use Google Maps and City Mapper to know exactly which bus on underground line is best to get to your destination. However, if you do not have internet ot your cell phone, do not be afraid to ask for directions, the people in London is usually very friendly and the police men are always nice.