You can't change others
When was the last time you tried to change someone's behavior and succeeded? The answer likely ranges from "never" to a "slight change."
Now, consider this: When was the last time you wanted to change your own behavior or habit and succeeded? Again, the answer is probably similar.
So, trying to change others is essentially pointless. But don't be discouraged—there is a simple way to influence others' behavior: by changing yourself.
If you reflect on your own successful changes, you'll often find they were sparked by someone else inspiring you to strive for better. This has been true in my experience. The habits I've adopted are largely due to being around people who motivated me to improve.
You can't change others, but you can change yourself. By doing so, you might inspire others to follow suit.