  Different well-know ways to reheat the universe such as instant preheating,
the creation of particles nearly or conformally coupled with gravity, or from
the decay products of a curvaton field, are revisited and discussed in detail
in the framework of quintessence inflation, where the inflaton field at the end
of inflation, instead to oscillate, rolls monotonically towards the infinite to
drive the universe to a kination regime. For any kind of these preheating
(particle creation) mechanisms, in order to calculate the reheating
temperature, we point out the importance of the Big Bang Nucleosynthesis bounds
and the decay process of the massive fields involved in the theory, whose decay
products form a relativistic plasma whose energy density eventually will
dominate the one of the background after the phase transition.
