Distance Management- Inferior Position

Sometimes in BJJ things don't go according to plan. This is when being able to manage distance is most critical.
The goals when working from undesirable positions are:
1.implement barriers to impede my adversary's forward progress
2.create a beneficial geometry
3.increase my mobility and inhibit opponent's effective pressure
4.mix in attacks while defending
A practical application of this philosophy begins in side control: 
Barriers- framing with my arms against the jaw-line and hip of my opponent
(proper framing theory warrants a second post)
Geometry: turning on my side, facing my opponent, and freeing my far shoulder blade
Mobility: using barriers and geometry while adding a hip escape or shrimp
Defensive Attack: many examples including arm attacks from bottom side control