Your mind seems to be like a speaker system, and it is constantly engaging in noise and commotion and making sounds and broadcasting. It has something to say about everything and is very chatty. It also uses its chattiness to try to figure everything out on its own. It thinks it possess the only way to communicate. But all it does is broadcast and rarely listen, which is the ego's use of it to ignore receiving anything from God.
Now, what you need to open up to, is the idea of also having a microphone in your mind - an alternative mode of functioning, which is extended toward Spirit. This microphone is not a broadcast system. It is receptive. It listens. It receives input and guidance. This is actually the mode it is supposed to function in as given by God - open to receive and serve His extension of Spirit.
Here's the catch. If the speaker system is blaring and the mind is being used to think and figure out and communicate thoughts, the microphone would pick this up and you'd have a feedback loop, which is not useful. If you're going to really use your microphone to listen for spiritual guidance, then you need to stop broadcasting for a moment.
So you need to realize that your mind, basically inside your head, is always trying to chatter away and make noise and run the show, but it really needs to shut the hell up for a minute. You are not this mind, and you're perfectly capable of not 'using' it temporarily. Instead, you're going to stop using it to make thoughts and sounds and put your focus on listening to Spirit.
Instead of being a broadcaster, you want your mind to listen and be a receiver. This allows it to plug into the microphone which is extended to Spirit. The mind is now open to receiving input, and this is a very different 'use' of the mind. It's a whole different mode, and this is how the mind is supposed to be used - in the service of Spirit rather than running its own show.
You put your attention on Spirit - Holy Spirit, Jesus, God, spirit guides, angels, whatever... and you quietly listen. You have a certain 'expectation' that you are going to be told something. You might ask a question, but make sure that after you ask you stop trying to use the mind to 'figure out' an answer. Figuring out is not allowed. The mind is so used to be used to figure stuff out that you just default to doing that quite easily, so be careful to catch yourself.
Even though your mind is very capable of figuring things out, and in understanding things, and in logic and so on, and in creating thoughts and engaging the world, and it's a powerful tool, we're simply going to choose to not use it right now. We're putting this tool down and we're putting it into a 'standby' mode where it listens to Spirit. So be careful, if you launched into coming up with answers on your own using your mind, stop it, and go back to listening to Spirit.
Most likely you will hear some response and it should come to you as words or an image or impression or something. You will 'receive' it.
So really this is all about a shift in ego, because the ego is a broadcaster and noise-maker, and it uses the mind to figure stuff out on its own, as a replacement for being guided by Spirit. Our minds seem to default to this mode of operation and we don't realize there is another. We're not used to receiving or listening. We want to do it all ourselves. That's ego. Its the authority problem. "I'm so great my mind is amazing I don't need guidance I can just figure out what to do". You can figure stuff out but it won't be what works. Stop it. Listen and receive. This requires some surrender of control over you life and a willingness to serve God. If you don't want to serve God, how is God going to send you instructions of what to do? :-)
As you practice this over time you will notice a shift taking place where you start to change your sense of identity, who and what you are, away from being totally identified with mind/thinking, and more towards 'Spirit'. This is what I'm experiencing right now. I see my mind more as a tool that I can decide how to use and not one that I have to just automatically use to decide what to do on my own. It requires surrender and openness to receive. So now, instead, I am allowing Spirit to tell me what to do. And this is where the line from ACIM miracle principle #4 comes in:
"All miracles mean life, and God is the Giver of life. His Voice will direct you very specifically."
And HE WILL direct you very specifically if you will let Him do this for you and not try to do it all yourself. If what you want is to stay being an ego who runs your own life, you can't expect to receive guidance. Put that aside and be open to trusting that you will be directed and guided. The guidance is waiting for you to listen.