Accept tasks without complaining. Cleaning drip trays, flap and landing gear bays, removing and treating corrosion, de-panelling and replacing floor beam anchor-nuts is dreary work but showing willing and doing a good job will get you noticed and you'll move up a step or two. Complete servicing documents fully and correctly (work carried out in accordance with the relevant AMM section & paragraph etc, / recording part, serial, batch numbers and tool calibration dates) and you'll get on well with your certifying engineers.
Leave your mobile phone in your locker.