Easy "Beyond the Possible" achievement:
Select level 1, as it is the easiest to complete. Some areas may require a few attempts to learn. At the harvester part, travel in circles to avoid the rat. If you run over the rat and return to the game it will crash. Once at the heist, choose whatever you feel comfortable with. If you die, the game will resume at the start of the heist.
Easy "GaGa" achievement:
While playing David on the "London" map, cycle through all the radio stations available.
Easy "Practice Makes Perfect" achievement:
Complete London level without dying. To do this easily, play in windowed mode. If you die, immediately close the game by clicking the "X" icon in the top right corner. Run game again to resume the level without your death being recorded. Continue until after after helicopter part. You do not actually have to do the heist.