Pick your battles but try to stay consistent. Depending on the severity and frequency of the negative behaviour, exhibited by your child, you may feel that you haven't the energy to tackle it everytime. It may be better to note it down and deal with it later. What you have to avoid is giving confusing signals to your child by being inconsistent. Try to give a clear message that the behaviour is unacceptable at all times, not just when you remind them.
Have very clear written down rules - use a Behaviour Response Chart to establish consistent approach between parents and other adult carers.
To keep the balance of comments and interactions positive
When it is in your own interests! There will be times, such as public places, when you may feel that ignoring minor misbehaviour may be better than dealing with it, particularly if that risks escalating the behaviour.
If you are using a behaviour or motivation chart related directly and specifically to the behaviour that your child is engaged with then you should not ignore. This is particularly important in the first few weeks of a reward system when you are actively trying to influence a behaviour change.
