I set up my summon and equip/upgrade powers on a separate bar, with a macro to switch to it (and one to switch back).
That way I don't lose spots on my command bar (8 macros for setting stance and behavior, plus 2 leadership toggles!) or on my attack bars for summoning.
/macro Summon gototrayalt2 4
/macro Control gototrayalt2 3
I also have a "Temp" and "Teleporter" control tray (tray 9) since those see sporadic use as well.
Now, about those 8 stance and action macros... the stock macros you get out of the box, frankly, suck. Do you REALLY want your bots to go aggressive every time you tell them to attack something? No! So, what i did was this:
Scrap the three stock macros, and create these 8 macros:
/macro Agg "petcomall aggressive"
/macro Def "petcomall defensive"
/Macro Pass "Petcomall passive"
/macro Attack "petcomall attack"
/macro Heel "petcomall follow"
/macro Goto "petcomall goto"
/macro Stay "petcomall stay"
/macro Bye "petcomall dismiss"
Now, for all of the macros except the last one, you can type the command once, and then drag the icon from the pet tray's Advanced View. This makes it prettier (icons instead of text). Since dismissing a pet removes it from the pet window, there is no icon to 'steal'. So that one will have to be a typed macro, if you plan to use it. Some MM's don't.
Now why would I break out the stance and action commands like I did? It's like this. I can now set them into any stance, and have them do any action, independently. Follow Defensive? Sure. Goto Aggressive? Got that too. Stay Passive? Done.
There's two other tips I would like to pass on.
1) Focused Firepower Is Your Friend.
As soon as you get more than one minion, having two (or more) focus their firepower on a particular target is a good thing. It goes down quicker. When you get to high levels, and there start to be annoying critters in the spawns (ones that could wreak havoc with your nefarious plans, such as Longbow Nullifiers), you need to be able to tear them apart before they can so much as get a shot off. This strategy is known as alpha-striking, and it can be VERY effective as long as you know what you're taking on.
2) Never Take The Alpha
As the MM, you yourself are a weak little milquetoast, with only the power of your minions to back you. As such, you never ever EVER want to attract the ire of a spawn on you if you can help it. So... if you need to pull... have a minion do it. */traps MM's have several good methods (seeker drones, acid mortar are my top faves.... caltrops less so because it will slow a spawn down, they still see YOU as the source of the pointy bits). Once the return volley has been fired (at your bots, NOT you!) then it's probably pretty safe to lay a poison trap, fire off Weaken, use a force bubble attack, or what have you. Forcefield MM's can just turtle under PFF once they've told their bots what to do, of course.