Lockward writes in point 5 of a 10-point list about arrangement of poems in a collection:
Work really hard on arranging the order of the poems. For many poets this is the most difficult part of putting together a manuscript. That's what friends are for. Ask a few poets whose judgment you trust to read the manuscript for order. Avoid the inclination to group similar poems together. Again, too much sameness leads to boredom. You want some kind of thread or threads running throughout, pleasing leaps from one poem to the next, surprises, and connections. Poor order was one of the main weaknesses in the manuscripts I read. You want a collection of poems, not a bunch of poems.
Here's a link to the complete blogpost.