Goal and options: To salvage books you have read,
output answer: do not write in them or bend the pages down and then resell them on Amazon or eBay.

Goal and options: To melt coconut oil that has hardened,
output answer: place container of coconut oil in the microwave and microwave for thirty seconds.

Goal and options: Tame fly away strands of hair.
output answer:
Spray brush with hairspray before brushing.