Google Adwords Keyword Optimizer
This is a tool that can allow you to quickly optimize your Adwords Keywords by adding ‘double quotes’ and ‘square brackets’ to your keywords.
It also de-duplicates keywords. So you can paste your existing keyword list from your Adwords account into this, and you can get a de-duplicated list with the different keyword options added to it.
You can also use it for new keywords, so that you can keep brainstorming new keywords without worrying about creating 3 versions of each keyword.