you can use your W to help leash, stop / help invade, and force a very good exchange at lvl1, you will want to start with your W 90% of the time, it is the champion's main skill. hide in the bushes, wait for the right moment and use your W on the enemy ADC, then use your Q and go back to your ADC allied with your E to heal him, if he is full life, take the opportunity to auto attack the enemy . then come back with E.

in a TF, start with your R, you can use skills with it activated, use R + W + Q + E to get back.

also use your W to save an ally from a chase, use the W on the stalker and then the E on your ally.

well, start your E in lanes where your lvl1 is worse than the enemy's, your E with your passive and your guardian rune give a large amount of shield, which can most of the time end up saving your ADC
 

avoid using W on enemies without having E to return safely

check that your passive is loaded before executing a risky dive / move

of roamings, the rakan is a champion with a lot of mobility and whenever his lane has pressure, try to help his mid or even climb to his top when his lane is very easy.