In other to convince someone to do what they didn't want to do you must make sure what you are convincing them for is something that really worth it. Making sure that enough reasons are given and explaining and elaborating why they need to change their mind is very key. Some people are very adamant and they might have concluded already.This will make it very difficult to sneak into their heart and doing the changing things.
We must also put into consideration that we are trying to make someone change his mind so we mustn't be harsh about how we present it. Showing more liniency will add to the success of the game.
Also if there is any instances that can be given to buttress the points,it will be of advantage.
I was convinced by a friend to keep trying contributing on projects on Steem block chain after series of failure and I yielded due to how he approached the matter. I gave my excuse but what rendered me powerless was one statement. He said okay don't use your precious time,only contribute at your leisure. I was moved and that's what got me answering this question.