Improved Democratic Nomination

[Frodo]

Replace caucuses with open primaries -with the sole exception of Iowa.  Also, adopt the rotating regional primary system.

Otherwise, I don't really see much else that needs to be improved.  I like our proportional pledged delegate system (as opposed to the GOP's winner-take-all approach), and the super-delegates serve to prevent unelectables from winning the nomination (and it usually works).  Though I am open to reducing their numbers somewhat.  

[Frodo]

Another idea that came to mind is to replace Iowa and New Hampshire with Nevada and South Carolina as the first two states that Democratic candidates should cater to.  They are diverse enough to reflect the Democratic Party of today and the immediate future, but not so large (I think) that presidential candidates can't lavish the same personal attention on them that Iowa and New Hampshire currently enjoy.    

[Frodo]

There should be a nationwide primary.

That only the best-funded candidate can win.  Which would be a boon for establishment-preferred candidates.