I pay more attention to the ICO in the field of finance and real estate, I think they will be the first really working projects on the crypto market!
To briefly expand on that, irrespective of the filed you decide to invest the main thing is to look at the whitepaper and other places like telegram groups etc to gather as much info as possible. This will tell you if the project is worth while or not.
So in any of the ICO you are interested you join the their telegram group? It surely is a good way to get know the project team and to get the latest news about the ICO but it costs also a lot of time to get through the whole history of messages. For a bigger investment/participation in the ICO it is surely worth the time to have an overview about it.