[Liz]

....post a sign-in sheet at the polls to be signed by each voter noting that there are penalties for voting illegally. Their signature (1) attests that they are American citizens, and, (2) that this is the only place they will be voting.....

That's a good idea for starters. Should be taken a step further.

Every absentee ballot and every sample ballot mailed to voters before the election should also have a notation: "voting illegally is a felony punishable by jailtime---and that signing voting books at the polls using some one else's name is a felony compounded by forgery."

[Big Giant Head]

Voter rolls should be eliminated. Register 30 days before the election, every time. No less than thirty days.

[TangoLimaSierra]

Every absentee ballot and every sample ballot mailed to voters before the election should also have a notation: "voting illegally is a felony punishable by jailtime---and that signing voting books at the polls using some one else's name is a felony compounded by forgery."

Make sure it's in Spanish, also. It would be good idea to have it at the voting booth, too.