.. as you, Father, are in me, and I in you, that they also may be in us .. (John 17.21)

That is Jesus' prayer for us, his folowers.

I think to be "in God", it helps if you and I are focused on God.

There is no formula for it. If we think we have THE formula, then we might be off target. The moment God is defined by formulaic predictability is the moment we lose sight of his God-ness.

The important thing is to avoid (or to reduce) getting distracted by our circumstances. We can be in a crowded place, bad situation and what not, but still we can focus on him regardless of outward circumstances.

We are bound to lose focus from time to time. That's normal. But we need to realise it when it happens and refocus.

Healthy eyesight do not fixate focus continuously on only one object at the centre of the frame. The eyes shift from object to object while at the same time, keeping the target subject in frame and return it to the centre of the frame again and again.

Likewise, we need to always keep God in the frame of our "sight" no matter what our circumstances are and refocus on him as the centre of our life, again and again.