I'll add to this as ideas come to me.
There shall be a right to trial by jury in all cases.
Abolish sovereign immunity.
Restitution must be made to innocent people falsely accused, if no charges are filed, or if a person is found innocent the state must bear their legal fees, lost wages, etc. Similarly, those who sue and lose should bear the costs to the defendent.
The punishment for legal negligence should be equivalent to the potential damage caused by the negligence. If a prosecutor neglects to produce exculpatory evidence during discovery, then he should get the same penalty that the defendant would have gotten.
There should be something akin to habeas corpus for evidence.
The president gets 2 weeks vacation per year, as do congressmen.
Congressmen must show up for work, i.e. they must be present to vote unless they're on vacation.
Congressmen must read and understand every bill they vote for. Perhaps bills should be read aloud before a vote, or maybe there should be a quiz.
Probable cause should be just that, probable. If any judge issues warrants, or officer makes arrests, and these warrants or arrests lead to convictions in less than 50% of cases they must lose their authority to issue warrants or make arrests.
Given the widespread practice of 'testilying', it shall be presumed reasonable to doubt any testimony given by a police officer. Everything an officer does while on duty must be recorded.
All jurors should be informed of their responsibility to nullify unjust laws.
Passing a law that is found unconstitutional will result in impeachment.
No corporate personhood.
No victim, no crime. If there is no actual, specific, individual victim, no crime has occurred.