Special Summon this card during your Standby Phase, and use its first effect to Special Summon "Kozmo Forerunner" from your hand, allowing you to use the Standby Phase effect of "Kozmo Forerunner".
After your monsters attack and destroy all of your opponent's remaining monsters by battle, Special Summon this card during the same Battle Phase for a direct attack (an easy way to trigger this card's last effect). Depending on the card you search, this may result in an OTK.
Special Summon this card during your opponent's End Phase, and use its first effect to Special Summon "Kozmo Sliprider". Then, use that monster's effect to destroy a Spell/Trap Card your opponent Set this turn.
Alternatively, Special Summon any monster with this card's first effect. This can help enable an OTK during your next turn, since you Special Summoned a monster that you would have to use this card's first effect to bring out. Because of this, you avoid the "once per turn" limit for the first effect of "Farmgirl", allowing you to use that effect during your next turn's Battle Phase.
Special Summon "Psychic Commander" and use its effect to ensure that this monster inflicts battle damage.
During your Battle Phase, use this card's first effect to Special Summon "Kozmo Goodwitch". If you have a Level 5 or higher "Kozmo" monster in your hand, this will allow you to inflict more battle damage to your opponent this turn (possibly resulting in an OTK), by using the first effect of "Kozmo Goodwitch".