Whilst driving the lowest cASK possible, is absolutely critical to margin improvement, it is also important to explore new revenue opportunities. This is where, and why, ancillary revenue, is so fundamentally important to the success or most low cost airlines.
Driving up fares does little. The LCC demographic is price sensitive. There is no yield play within cabins.
You should encourage your cabin crew behind the door, to actively pursue inflight revenue as aggressively as possible. In Australia, this is not front-of-mind, but is in other countries, and operators.