How hard do you find organizing people and/or activities?

It depends on how people cooperate and how activities are set, however a professional manager may like hard tasks !

I'm Agree With All Expert Answers

You have to organize yourself and your business

 You have to orientation

When working with a group of people and as part of a large organization, it is essential to set clear goals and objectives to base your future decisions on. Every RSG is required to define these goals at start-up and to reevaluate them annually. This way you clearly define what the main tasks are that you want to accomplish and how you plan to achieve them. This is a vital skill to have before undertaking any larger project. I have found myself setting goals and objectives for every new research project after my experience with the RSG and have become more efficient because of it.

I FULLY AGREE WITH THE ANSWERS BEEN ADDED BY EXPERTS...........THANKS.

It is not hard, if you believe in yourself and have the right attitude and abilities then you can effectively organize people / activities whatever you want to organize. 

It is really hard to organize people or activities because every person has their own mind and thinking, so a team leader should have the capabilities to handle it. He or she should ask everybody for their opinion and then should come up what is the best way to do as a team.

I find it easy.  Why do you ask?