Some other tips to add in...
-
ALL of Nami's abilities that hit an ally give movement speed. This includes her Q while running back to lane.
-
Nami E can use her E (Tidecaller's Blessing) to let the ADC kill caster minions after a turret shot in a single auto. (with im pretty sure all conventional ADCs)
-
You can ward from Dragon Pit into the bush behind the blue side red buff..... and from Baron pit to the red side red buff.
-
Kaisa calls out how many people shes killed after getting a kill with varying commentary afterwards.
-
Ryze ultimate can be timed to dodge Karthus's ultimate.
-
Urgot ultimate can be cleansed with Quicksilver Sash, Gangplank's Oranges, Rengar's empowered W (the battle cry?).... etc.
-
Champions can "combo" in a variety of ways: Sion/Tahm Kench with Lee's Q or Zileans's Q on a minion and shooting the minion into enemies; Blitzcrank with Thresh or Kalista for super long pull; Tahm eating Rumble with his Flamespitter going or Lucian with his "The Culling" (his R) going will not interupt it; you can take 3 people on a ride with Tahm if Kalista ulties someone who is not tahm and jumps into Tahm's ultimate; Etc
If i can think of any other interesting tips then I will try and let you know.