Usually, if you want to make effective use of your Lucky Egg, do it either during a community day or a raid day. Have tons of evolution fodder like Pidgey or the worms. When ready, pop the Lucky Egg and start evolving. If it’s a Raid Day, start going around raiding as quickly as possible, and evolve in between. If it’s a community day, it’ll be good to have a GO Plus to help you catch all the spawns