For myself I find some confusion in the how to put on Christ - what's it supposed to look like for me?
I don't really know, so I become mental about everything because my physical existence is impaired.
I struggle with physical disability and I have to make choices like, do I shower today or get a few dishes done? Everything I do has to prioritize absolute necessity, and it often pits one necessity against another when I can't do everything I need to do.
I feel every day that I am in well over my head, this week left me thrown back into cyclical pain and needing IV morphine on top of my regular pain medicine.
So, I don't know what it looks like, or what it's supposed to look like.
I have a shorter fuse when my pain is unmanageable, I need more peace, no stress, more quiet, more prayer, more time with God.
This is my blessing as a Christian actually, because the one awesome thing I have is prayer and a feeling of God's presence in my trials. He is what holds me up in every respect, holds me together when I'm curled fetal crying. I'd say He holds me in good times or in bad but I'm not sure good times ever really describes my actual life.
Verses like "for in Him we live and move and have our being" are tangible for me. Without God I'm not making it to the bathroom much less something more complicated... there's little I engage in without sincere prayer to make it through.
I also talk to God in my dreams, about everything - I talk to Him about forum posts, false prophets, just various things, so my prayer life never stops, not even in sleep. But these are the things on my mind, so I speak to God about it waking or sleeping.
I don't have a lot of physical sins. My husband and I rarely argue (3 real arguments in a decade) I don't often lose my temper but I do sometimes so I have to work on it still, but real life doesn't actually provide me anything to get upset with that's not myself. I don't drink alcohol though I do take prescription medicine.
My enjoyment is to read Scripture and talk about God, though I fear saying things wrongly since I had to start taking medicine again (I was saved disabled but didn't take medicine the first few years, it was a specific injury and another spinal reconstruction surgery that created a perfect storm in my life, and put me back on daily medication.)
So I'm not sure what putting on the new man looks like, or whether I have done so. I just try and keep my focus on Christ and not myself and do my best in Christ to get through each day.
I'm not always sure it's successful, but I'm still alive and I think maybe my life is or can be pleasing to Him, I pray.
I'm not perfect by any means, but it's an uphill battle. I'm just doing my best and trusting Him to help me along and point out my weaknesses - which I have many, and errors, and sins, which I have many.
Not focusing on His Glory enough, not thinking about whether He wants me to do x, y, or z sometimes, sometimes I just talk too much about stupid stuff, sometimes I argue online when maybe I shouldn't and so forth, just generally not always putting Him as first as I should.
I think as a Christian in a self examination I'm growing into a more mature Christian, learning slowly but surely what God wants me to do and trying to adopt those things until they are naturally thought and done.
A Christian in Complete Armor Volume 1 by William Gurnall is a book I got at Christmas-time and while at times heart stopping, it's actually good.