Keeping God in mind all hours of the day is not possible. We must sleep at some time. (Yes, there are some saints who deprived themselves of sleep so they could do God’s work; such was their calling, and cases like that are quite rare). Upon rising, it is beneficial to say and mean a prayer that goes something like this:
"O God, I offer Thee all my actions of this day for the glories and intentions of the Sacred Heart of Jesus. I wish to sanctify every beat of my heart, my every thought, my simplest works by uniting them to Its infinite merits. I wish to make reparations for my sins by casting them into the furnace of Its merciful love.
O God I ask of Thee for myself and for all those I hold dear the grace to fulfill perfectly Thy holy will and to accept the joys and sorrows of this passing life so that we may be one day united together in Heaven for all eternity."
While God cannot be in mind at all times, if you say and mean a prayer such as the above, i believe it can suffice.
It is true that i go about my day scarcely thinking of God and i’m going to share a story which made this very clear. i used to pray a Rosary every day early in the morning. There was a knot that was loose on the Rosary between the Crucifix and the first bead. It was a type of knot that let the rope pass by when pulled a certain way. With my borderline-OCD i would always feel the need slide the knot back up to the first bead upon seeing this (it would slowly work its way down to the Crucifix). Then one day i made a little deal with myself. i did not slide the knot back up to the first bead as i would have liked to but instead left it as is and told myself that if i could think of it during the course of my day when i wasn’t praying the Rosary, i would let myself tighten it. i was amazed at how many times i woke up the next morning to find the knot still slid down to the Crucifix - i had not thought of my Rosary at all yesterday besides when i prayed it. Though thinking of God can involve much more things besides remembering a Rosary, it still stood that i did not give much attention to God in daily tasks.
There was one day where i offered up my eyesight voluntarily. i closed my eyes and fastened a sock around my head. i was able to do this since no one else was home all day and i had no other important tasks to attend to that day (otherwise i wouldn’t recommend it). Among other household chores i found it peculiar how many things were still possible. During the course of the day i put the silverware away. i was able to feel which utensil it was and feel where it was to go based on the ones that were already in there (i look at the silverware drawar all the time but it surprised me i hadn’t memorized the layout). Anyway, to this day when i put away the silverware i usually remember that day i had no eyesight and remember to thank God for my eyesight. There were other tasks i did that day that have not retained this facet, though, like folding the laundry. It was otherwise truly pathetic how unthankful i was for my eyesight even the very next day after the “blind” day - i scarcely thought of it. How easy it is to take God’s gifts for granted!
And pretty much every time i see chimes throughout my daily life i remember to think of the souls in Purgatory and ask God for forgiveness for them; another long story.
It would be ideal to eventually have some material instrument remind me of God in some way.
). I’m still not very good at doing this, though, for extended periods of time. Right now, when I am not at home, I actively “remember” Him only at various scattered points throughout my day. That’s okay though–I’m thankful for that.