How do Christians incorporate present moment everyday faith in light of God's multi-generational nature? From reading the Bible, I have always had questions about how God works slowly over many generations of people and more specifically about those who live in what I call "God's Silent Periods". 

For example: The Bible contains many instances where it states to the effect; "..and becuase of this, the Jew's were enslaved in Egypt for 500 years" and then moves on to the next Bible worthy important event - as if 500 years is nothing! 

Perhaps to God 500 years is a blink of an eye, as He is the same in the past, present and future - but to these generations who lived during the 500 years (just imagine if you and your generations lived during that period) that is  many life times of a specific experience of who God is. It appears it is God's will that some will live and experience their lives in such periods (perhaps us), to forward his will - on His time line.

For example, during the slave generations, even if one individual had enormous faith in God, it could not change their life predestined in slavery. On the flip side, for the generation of Jews that lived when Moses came, their tested faith now had a new power - the power to directly free them from slavery.

(Please note this is just one example of this what appears to be cyclic nature of God.) 

The question is: How do Christians incorporate and harmonize their personal present moment everyday faith, in light of God's nature as explained above from the Bible?
If I understand your question correctly, the answer is "watch and pray". In Luke chapter 21 some of his disciples were remarking about how beautiful the temple was when Jesus told them that "the time will come when not one stone will be left on another; every one of them will be thrown down.”

The disciples then asked "when will these things happen? And what will be the sign that they are about to take place?"

Jesus then tells then what signs to look for and ends his instruction by saying "Be always on the watch, and pray that you may be able to escape all that is about to happen, and that you may be able to stand before the Son of Man.”

Mark 13 also gives an account of this interchange between Jesus and his disciples but concludes a bit differently with the parable about the man who went away, leaving his servants in charge..."It’s like a man going away: He leaves his house and puts his servants in charge, each with their assigned task, and tells the one at the door to keep watch.   Therefore keep watch because you do not know when the owner of the house will come back—whether in the evening, or at midnight, or when the rooster crows, or at dawn. If he comes suddenly, do not let him find you sleeping." 

What were they watching for? The signs that Jesus is about to come again. What were they to pray for? To be awake, so as to escape from the coming judgement. 

This is especially meaningful in light of your question of the "inter-generational" nature of God's timetable.  God knows it's going to be a while between courses but he's trying to get us to focus our attention, knowing we are very prone to wandering off the path if we see some shiny bauble. It's almost like he's saying "pay attention!" 

Jesus asked his disciples to wait for him outside the garden where he went to pray just before he was arrested but rebuked them with "couldn't you wait for one hour with me?" (He probably would have said "Jeez" if he wasn't Jesus). But I think the point is that in our everyday lives, we are waiting for someone, and the exhortation is don't get impatient as it may be a while. Just keep looking every day, and just keep waiting every day, and while you're waiting ask the Father for mercy. I think it keeps us focused in the right direction as it keeps our eyes on Jesus, rather then worrying about the timetable.