Defending social security, medicare and medicaid.
Building the costs of protecting the environment into products and services-- and including those costs in global trade agreements.
Eliminating corporate personhood.
Pruning back or ending the sequester, and many of the draconian laws that were passed in response to 911.
Reversing Citizens United and limiting campaign spending to a fixed amount. Eliminate PAC spending on campaigns entirely.
Making computerized and internet and mail-in ballots illegal-- only allowing hand counted paper ballots.
Taking government out of personal lives-- but allowing maximum freedom of choice-- that applies to contraception, abortion, gay marriage.
Supporting legislation like Australia has for guns-- make it illegal to own automatic or semi-automatic weapons, gun clips that hold more than 10 bullets, requiring registration of ALL guns, including existing ones, requiring guns made illegal to be handed in.
Protect workers and unions.
Ban global trade agreements as they now exist, which enable American industries to be wiped out.
Dismantle or nationalize too-big-to-fail banks and financial institutions.
Apply strict environmental regulations to all domestic oil and gas drilling and transport, including shale gas and Keystone XL.
Establish a national public bank and make it easy and support state, county and municipal public banks.
Support single payer health care.
Reduce the military budget by 50%.
Support job creation over budget balancing. The austerity research was bogus. Trash and attack it and its advocates.
End the use of drones to attack civilians or anyone in civilian areas.
Change laws so formerly US corporations can't become multinational, using foreign offices to avoid taxes. Apple, with $100+ billion in its coffers, announced it is borrowing $17 billion because of crazy tax laws.
Put everyone who wants to work in a job-- create a modern day conservation corps.
Enable instant run-off voting or a similar approach that allows people to pick their first, second and third preference candidates.
Protect and reward government whistleblowers.
End the filibuster entirely or drastically change the rules.
Re-establish the balance of power between the three branches of government.
Prosecute war criminals
make it illegal and un-profitable to buy media so it reduces media diversity
make it illegal for a member of congress or a staffer to work for any company with lobbyists or any organization that advocates before congress-- for ten years after leaving the job.
Make it illegal for legislators to give more to candidates than any citizen may give.
Challenge the intelligence/police state we have become. Investigate, with complete access, the CIA, the FBI, NSA, defense intelligence and every other agency that spies and collects intelligence.
Pass Internet openness laws. Build a national WIFI system.
Make college education free to all students who qualify-- and do what it takes to wipe out the crushing student debts that now exist.
Take aggressive steps to ban billionaires and make it illegal for people to become billionaires (It's my list)
Make it illegal for corporate heads to make more than 50 times the lowest salaried employee's income.
Raise the minimum wage so it is a living wage.
Stop supporting all dictators.
Stop supporting Israel when it elects right wing Dick Cheney MINI-MEs with right wing extremist policies.
Reverse policies that allow massive, privacy invading spying.
Support strong legislation that funds development of viable sustainable alternative energy solutions-- aiming towards elimination of the use of fossil fuels. Make all the costs of using and drilling for fossil fuels be included in the price.
Reverse privatization of prisons, the military, security, and anywhere else where privatization has been foisted, usually at greater cost, upon the public.
Take strong steps to protect the commons.
Pass the ERA (suggested in a comment by ANN)