Punctuality is highly valued so it is best to arrive on time for meetings or even a few minutes early.
Meetings are usually preceded by a short prayer and some small talk. Meeting agendas are common and usually followed quite carefully.
Meetings tend to take a lot of time, and are usually followed up by another meeting.
There is a common euphemism; MIB (which stands for Meeting Inda Beranti) loosely translated as Non-Stop Meetings.