Meetings at yunity are perhaps a little different to where you come from. The following is a list of general points that have lead to successful yunity meeting in the past

In general

A 'meeting' is when people come together to interact in according to a pre-decided intention, format, time-frame, etc.
A 'gathering' is when people come together around an intention. The details are not decided or are subject to change with the emergent group.
If a meeting has a start time, don't be surprised to find it's started if you turn up later.
If go to a meeting that's already started, don't expect the group to update you with all the information you missed.
Do record the outcomes of a meeting: it allows people who weren't there to collaborate and supports a culture of cooperation. Can be as simple as noting and individual/group actions
At the beginning of a meeting, remind participants of what they consent to by being there.
Be open. Let people know all decided details of meeting in advance. When, where, how, why. This can be done face-to-face, using a recognized notice board or the wiki calendar.
Meet now! All of yunity can never be in one room, it is not wrong to have a meeting that not everyone can attend.
If you want to host a meeting, consider simply stating a time. This can be more pain-free for everyone involved and it is your doocratic right.
You can make decisions within meetings with the people that are there. Make sure to note these down.
If you are hosting a meeting, consider the intention and how to achieve it. Single facilitator? Two? Game to begin with? Feedback round?
Encourage others to host meetings on where you normally would. Role rotation is beneficial on many levels.
If you want meetings to be on time, do not wait if it frustrates you - start on time. People will quickly learn that when you mean x'o'clock, you mean x'o'clock and will arrive on time in future.
People are not machines. Snacks, a nice location, breaks either side of the meeting, keeping meeting less than 90 minutes - all good things.

Morning round

A favorite at WuppDays, sometimes the only place that everyone can be together. The following is a template for how someone might facilitate a morning round incorporating the learning and wisdom of many morning rounds: how to participate awesomely, small talk aversion, separation of personal sharing and work organization, etc

Good morning! *Big smile*
The weather is (great/tornado/flood), perfect for (finally getting out the house/playing board games/doing manual work).
How did everyone sleep? (One word shout-out/mime/etc)
This morning round provides everyone the possibility to express themselves and think about their day.
First we will go round in turn, each person able to say how their feeling or what they're thinking and after everyone has spoken people can make announcements.
Take as much time as you need whilst remembering that everyone has the same right to talk. You don't have to say anything: you can pass or have a silent meditation.
You can give a small nod when you're finished talking to give an easy way for the next person to know they can start.
Would someone like to start? Don't be shy. (Look around, is anyone smiling? You can invite them to start.)
...
(If people start trying to make announcements, remind them this is about their feeling and thoughts and that there is space for that afterwards)
...
Thank you all for sharing. (Pause.) Now we have time to share any announcements for the group. Mmeetings, lost items, personal requests, workshops, etc, etc...
...
(If people start a dialogue which doesn't involve whole group, tell them this and ask them to continue afterwards)
...
(When it's starting to slow down) OK, are there any more announcements that everyone needs to hear?
Thank you all for being here, have a great day! (move/leave the circle)