1. Every red herring or false lead should tie into the story somehow.

Sometimes it seems that we find the need to throw in something in order to nudge our hero or heroine off the scent and push them in a different direction, but don't always make sure that they connect to the story at large. If we make sure that each red herring is connected to another character that will show up at a later time, there is more of a chance that we will make sure that little lead is closed -- or perhaps even followed more closely to lead our person even farther off from where they should be.

2. Write them down.

No really, I mean it. Have a little pad of paper at the side of your computer, or whatever you are using as medium to getting the story down, and write down every little question that you believe might go unanswered. When you are finished, look through, and make sure you closed them all up.

3. Find a guinea pig (possibly better known as a gullible friend).

We all have them, or at least, we can hope we do. Friends that are willing to set aside their computer game, or let their dishes wait an hour or two, and read your story. Attention to detail would be a good one here. If there is anything that makes them go, "huh?", it's likely something that would need to be clarified. Remember that your readers won't be sitting beside you as they read, able to ask questions as they go. So any questions voiced should be answered within the story, somehow.