A concrete practice-tool routine for Galio, built around its real cooldowns and ability costs.
Every few seconds, Galio's next basic attack deals bonus magic damage in an area.
Do nothing else for five minutes. The passive is the piece nobody isolates, and it is the only part of the kit that is always available.

Every few seconds, Galio's next basic attack deals bonus magic damage in an area.
Galio fires two windblasts that converge into a large tornado that deals damage over time.
Galio charges a defensive stance, moving slowly. Upon releasing the charge, Galio will taunt and damage nearby enemies.
Galio will briefly step back and charge, knocking up the first enemy champion he encounters.
Galio designates an ally's position as his landing spot, granting all allies in the area a magic shield. After a delay Galio smashes down location, knocking up nearby enemies.
Practice tool lets you reset cooldowns, which is useful for learning a combo and useless for learning a champion. Turn the reset off and cast on the real timings — knowing what an ability's downtime feels like is most of what separates a comfortable champion from a new one.
Galio is mana-gated, which is the real limit on how often you can contest a wave early.
Unglamorous, and the highest-value five minutes of the routine. Melee champions have completely different tower-farming patterns, and this is where you find out which one you are actually playing.
These are the designers' words, not ours — the tips shipped in the client for Galio.