If you don't know the candidates for a particular race or the details of a particular issue, you absolutely
should leave those blank, as Dave said. Only vote on those races and issues where you know the details. OR, if you are affiliated with a particular party, you can vote along party lines on those races and issues as you see fit. But if you're just guessing or voting for the candidate with the most vowels.... God please leave those blank.
so what happens if only like a few people vote for them? is there a certain percentage that they have to get, or is it just whoever gets the most?
Some measures, tax proposals, levies, and initiatives may fail if they don't get a certain turnout or percentage of votes, but in races it is always the candidate who gets the most votes. By voting blindly, you may be negating the votes of those who are actually familiar with the race/issue.