How to tell when to flush the pipeline
There are some indicators that a prospect who's currently in your pipeline is not worth immediate and continuous attention. Here are three examples, but you'll probably be able to come up with a few more on your own:

• Ask yourself - would a customer laugh at the idea of being in your pipeline? If they don't take you seriously, don't take them seriously.
• Ask your prospects if it's possible if they will actually make a decision this month. If the answer is no, it's time to move on.
• When someone says that they would like your product or service, but not this month / quarter, it may not seem like a lost cause, but it is. You must consider them for flushing because there's nothing you can do to close them within the constraints of your sales cycle, or even the near future.