This is one of my favourite collects (set prayers), a prayer for advent by Richard Baxter (apparently written in 1691):
Keep us, O Lord,
while we tarry on this earth,
in a serious seeking after you,
and in an affectionate walking with you,
every day of our lives;
that when you come,
we may be found not hiding our talent,
nor serving the flesh,
nor yet asleep with our lamp unfurnished,
but waiting and longing for our Lord,
our glorious God for ever.
Amen. Come, Lord Jesus.