The most important components in planning are deciding on the offering, token design, white-paper, precautions against the hackers, and doing the communication. Start defining with the amount you want to raise and the results you are expecting with the particular distribution method. Planning phase is focused on the business requirements and motivation behind creating the ICO like raising most amount of money, building broad base of supporters or any other motivation.
Keep a clear picture of processes you are going to follow, this includes deciding cap, the money you want to raise, allocation of money between team, investors, partners and deciding the sort and hard capital. Planing process also contain working on some essential elements like the type of currencies you are going to accept, KVC process structure, How long will your offering be for, will you