Well, God does a lot for me, although I cling to Him really as a coping mechanism. Like a lot of people with mental health challenges, and maybe also like you, I've had a challenging life at times. The grace of having a mental illness is that God becomes paramount in your life.
What God has done for me is to give me a life where I have these problems so that I can cling to him as my only hope. I don't always succeed at putting God first, because there are a lot of things in life to distract our attention, but my faith in God's word tells me that this world is passing and that the only thing that will last is the eternal city of God, described in Revelation 21 and 22.
As cliché as it sounds, if I had everything I wanted, and if my life was being fulfilled before my eyes the exact way I wanted it, I guess I wouldn't have a need for God and certainly no desire to be connected to anything that would seem UNCONNECTED to what my happiness in the world could give me.
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Having written this, I now realize you were probably specifically asking me what he does for me in regards to warning me about a train of thought that is coming. As regards that, he begins to show me that a specific temptation in my thought life is coming. I will start thinking of something that seems innocent, but it is really just an evil spirit or company of spirits trying to keep me in the mental realm, where evil spirits can destroy me.
It is hard to overstate the fact that Satan and demons occupy the mental realm. If you have lived at all in the last 50 years and suffered the things that routinely happen to people these days, it's fair to say that your mind is "shot" enough to where if you do anything but constantly renew it in God's words, you are just going to be a mental wreck.
I wish I had known before about the importance of living out of our spiritual selves instead of our feelings and thoughts. This world has so tarnished the trustworthiness of our thoughts and feelings as to render them completely useless.
I will be lying on my bed thinking about something that seems to be innocent and God will begin to show me (not tell me) where the thought process is going to lead. It is as though I can see the demons who are suggesting a certain thought pattern towards me to get me into the mental realm, which is where they thrive. God begins to show me the next step in the road, which is the thought that the demons will encourage next. It is as if a movie is playing out in my mind.
Does this make sense? It is as though I am seeing a movie and God is showing me the next "scene" that will take place in my head if I continue down the mental path.
Demons and evil spirits are tricky. They are happy to try to influence you to think about something totally innocent, as long as it gets you into the mental realm. Once you start cycling in your brain, you can always be fed more destructive thoughts, which you are more likely to encourage because you are already on the thought bicycle.