Stealing idea from David Christiansen’s Blog
If you find yourself ( or Tester 
) typing asdf over and over again as you test data entry on
a web-app, do this instead:
<script>alert("f")</script>Paste it in every field.
If an alert pops up OR the field gets saved and then gets rendered without the
script tags, you’ve found a cross-site scripting vulnerability.
The minute you find one, your brain will power up and you’ll find more energy for testing that data input.
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