A nice summary from the Daily Kos; note especially the next-to-last item:

Automatic voter registration at an array of state agencies

Same-day voter registration

Online voter registration

Allowing 16- and 17-year-olds to pre-register so they'll be on the rolls when they turn 18

Allowing state colleges and universities to serve as registration agencies

Banning states from purging eligible voters' registration simply for infrequent voting

An Election Day holiday for federal workers

Two weeks of in-person early voting, including availability on Sundays and outside of normal business hours

Standardized hours within states for opening and closing polling places on Election Day, with exceptions to let cities set longer hours in municipal races

Prepaid postage on mail ballots

Allowing voters to turn in their mail ballot in person if they choose

Requiring states to establish nonpartisan redistricting commissions for congressional redistricting

Ending prison gerrymandering by counting prisoners at their last address (rather than where they're incarcerated) for the purposes of redistricting

Ending felony disenfranchisement for those on parole, probation, or post-sentence, and requiring such citizens to be supplied with registration forms and informed their voting rights have been restored

Expressing support for D.C. statehood (which is the subject of a separate bill)

Public financing for House campaigns in the form of matching small donations at a six-for-one rate

Expanded campaign finance disclosure requirements to mitigate Citizens United

Banning corporations from spending on campaign purposes unless the corporation has established a process for determining the political will of its shareholders