A Few Quick Ground tips that will help a lot.

Here are some tips on how to get of your back from two positions on the ground, these are the most complained about so i will start with them
Sprawl:
Hold block when they stop hitting to get there stamina back up unload on there body and stand up.
Side control:
Same as before, hold block, land a parry unload on there body and stand.

Mount/Back Mount: Pause the game and leave if there is more than 2 minutes remaining, other wise, Hold block and transition when they stop punching to get there stamina back.
YOU CAN PULL THERE HEAD DOWN IF THEY HAVE HALF STAMINA OR LESS
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If you need help with any position in the clinch/ground let me know and i will add my technique to this post.