In my mind mount is a more nuanced position than people give it credit for. I feel like most people just kind of sit over someone expecting that to be all that's necessary to hold them down. We talked about 2 types of mount control in class 4/25. In those two types of control we broke the low control into 2 more categories, grapevine and BJ Penn mount. In both instances we are nullifying our partners legs with our legs, attaching our hips to their hips, and pressuring down. Although this limits our attacking options from a grappling standpoint almost exclusively to chokes, it does provide us with the ability to settle our adversary and maintain control slightly better than a mid or high mount. 
Mid and high mount provide more attacking opportunities, but can also be a bit more difficult to control. The transition from low to high mount is best done in incremental stages moving one side and then the other side little by little until you've achieved your desired position. When choosing a mount position to work from, look at what you are trying to achieve, what your attack strengths are, and which control style suits your game best. 

How do I defend this?
How do I escape this?
The cookie cutter answer of the BJJ black belt is "don't get there". That really doesn't seem that helpful, but it is true, and the underlying message is key. The problem you are having is not the problem, the problem is what ended you up in that situation to begin with. So when we look at something like how to escape pins, the first step is having a guard that's difficult to pass. What does that look like? 
Grips- At all points in playing guard at least one of your hands should be on your partner

Points of Contact- to go with the grips, you should in contact with your opponent with 3 of your 4 limbs (ideally all 4 are doing something)

Positioning- not only having points of contact but having optimal points of contact, knowing what positions benefit you and where you can be beat, the risks and rewards of the guard systems you choose

Activity- if you are attacking they have to worry about that rather than strictly focusing on passing your guard

Recovery- knowing when your grips and attacks have been beat and being able to bail and reset is just as critical to avoiding pins as any technique in your arsenal

Think about how the idea of prevention applies to your game, what would you add to this list of impassible guard concepts? What about other aspects of your game? 

INSIDE HEEL TOUCHES
TWISTERS
SQUATS
SHOULDER TOUCHES
REVERSE CRUNCH
TOE TOUCH
BOXER KICKS
SIDE PLANK
SIDE PLANK
​SIDE BICYCLE

JUMP ROPE
STACKING PLANK
MOMENTUM STAND HOP
MOUNTAIN CLIMBERS
DEAD BUGS

HOP
HOP
MONKEY WALK 
BEAR CRAWL
J HOOK
J HOOK
V UPS
WIND UP
CIRCLE IN 
​CIRCLE OUT

HIGH KNEES
KICKERS
TERMINATORS
SIDE LUNGES
HIP UP
HIP UP TWIST
TRIANGLE
SNOW ANGELS
PUSHERS
​PLANK

We don't really choke people in BJJ, but somehow that sounds more acceptable than strangle, so it's the become the common nomenclature. No matter what you call it, all we're trying to do is close off the carotid artery on either side of the neck. So how do we do that? Glad you asked, really there's 3 groups we can place chokes in that cover a lot of territory.
1. Naked strangles- chokes that function only utilizing my body as a choking mechanism
2. Gi strangles- chokes assisted by the cloth
3. Triangles- chokes assisted by part of the opponent
As we have seen in recent IBJJF competition the two handed predator choke can work, however it is not the most efficient means of accomplishing the task at hand. When we discuss naked strangles, usually our best tools become the forearm and bicep working in tandem to close off blood flow to the brain causing unconsciousness. In gi chokes the cloth can be both the choking mechanism as well as an accessory to forcing the tap. In triangles we use our opponent's body usually a shoulder or arm to close one side and our leg or arm to shut down the other forcing the panic button shut down and putting our partner to sleep. I think in some ways we often look at grappling to microscopically especially in the beginning, hopefully by categorizing the techniques in a larger sense it will allow you to understand things more broadly and expand outside of the 3 techniques a day model.    

50 triangles
40 shoulder touches
30 froggers
20 shot sprawls
​10 momentum stand flying knees

Jump rope
squat jacks
momentum stand pushups
sit through/ thread needle
​alternating plank

Inside Heel Touches
twisters
shuffle sprawl 
gorilla pass shot
j hook
j hook
shovel in 
shovel out
tantrums
​boat pose