Raise taxes, decrease military spending 40-60 ish% (honestly till we completely crumble, we need to have a means to protect ourselves should several countries decide to invade, pre 9/11 spending would be ok ish, imo), increase pay for teachers, spend on infrastructure, cut out insurance companies and completely socialize medicine and give all citizens access to the same healthcare as politicians and their families , re-regulate banks and hold them accountable for mistakes, cut pay and benefits for politicians (no more lifetime benefits for a job you no longer perform), stream line the tax code, legalize drugs and treat addiction as a public health issue (like Portugal I believe it greatly reduced their addiction rates if what i read is true), reduce or eliminate the cost of college, regulate oil companies or tax them into submission, raise minimum wage to $10.....
All of these would help if not eliminate our debt. But the change would be so radical that people's heads would explode.