For mainstream Christian theologians, the primary act of creation is making the stuff of everything; for Mormons it is perhaps the shaping of pre-existent stuff- the making of form.
But perhaps God's primary purpose was neither of these - but to bring the stuff of existence into a relation - each with every other. Because, naturally, there is no coherence - only chaos.
Before form could even be possible, first everything needed to be brought into relation. However, relation is something that happens between entities - so the implication is that entities were already present.
Entities were already there - in other words, life is eternal and universal (but very various!). Life is not the problem - the problem is to bring the multiplicity of lives into relation.
That was done through Love. The reason that Christians say God is Love refers to this primary act: God brought everything into relationship, by Love.
We can think of this primordial Love as a light emanating from God and bathing the universe in luminosity - everything is inside God's Love; or, Love could be a sea, and everything immersed in this sea.
So the first phase of creation was to make the universe 'one' - not in identity, but one group (or family) as a network of relations: a network of loving relations.
The second phase was to enable primordial Men to become divine, and share in God's love: this is a transition from being spontaneously bathed-in love, to each man becoming a self-conscious entity and then choosing to love (choosing to participate in God's network of loving relations).
So, the secondary act of creation is in relation to Man; and the enabling of each man's self-consciousness: so that we step-back-from the first state of unselfconscious immersion - become aware of ourselves as free agents capable for choice - and then decide whether or not to participate in the network of relations.
[This participation including the matter of making more (self-conscious) Men, who will then be confronted by the same choice.]
The choice is threefold:
1. To enter into the fullest relationship with God by becoming a fully self-conscious divine person and choosing to love God-as-a-person;
2. To return to primordial and unselfconscious immersion-in love, ceasing to be a person (e.g. the Eastern religious goal of Nirvanah, impersonal non-self);
3. To oppose God's unification of the universe through love, by explicitly and actively rejecting God - denying the desirability of a network of loving relations as the basis of reality: to assert one's autonomy from this web of love.
Note, for simplification, I have left-out explicit reference to the role of Jesus Christ - which relates to the process of self-consciousness - both in Man and in each man. I also left-out consideration of a distinction of God between Heavenly Father and Mother in Heaven.