How do I bias a coin flip?

Based on the paper it looks like 55% chance that it will land on the same side it started is possible. This was the most extreme subject.

The bias is caused by procession so I want my flip to process as much as possible. Maybe I offset my finger as far away from the center of the coin as possible. Also putting as much force into it as possible is probably a good idea.

Finally I have to catch it in a way that the top side is facing up when I reveal it.

Any thoughts?