Christ Disciples Int'l Ministries, Inc. - Successful Repentance...? How Is It Done...?

Hi,
How does one "successfully" and fully do that though...? Totally, successfully, and fully...? Therein lies the real problem doesn't it, and the problem of telling people, "just repent of your sin"... Just "obey", and by obey, all too many mean fully and completely do away with sin in your life...What are some ways to successfully and fully repent...? What are some successful ways to to obey in this manner...Does it happen overnight, or is it a process...
Please help.
I didn't find the right solution from the Internet.
References:
https://www.christianforums.com/
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Thanks