Daily Quests Concept
i got this idea from hearthstone. there could be a "quests tab" with weekly or daily quests.
possible quests could be like:
Win 2 games get 3 double kills kill 400 minions in a game place over 20 wards destroy the first tower in under 5 minutes get a Penta kill
each quest could reward IP or other rewards (maybe hextech keys or chests) and the rewards would vary based on difficulty of the quest for instance the Penta kill one might reward 500 IP as opposed to winning 2 games rewarding 200 IP or something.
i think it would also be an incentive for players to try more and become better at the game specifically the kill 400 minions in a game or place over 20 wards by getting players to focus on CSing more and getting better at it and teaching players to ward more.
just a thought