Ideas can flow from any where & any direction
This is my small idea:
Choose you basic idea (Main keyword). (Eg: Travel , poker , Domain , hosting)
Two Ideas to find the keywords:
Idea 1:
https://adwords.google.com/select/Ke...rceLegacy=true
Now search for the keyword.
Check-in the Synonyms box & Search for Keyword Ideas.
Now you will get a list of keywords related to your Main keyword.
Idea 2:
https://adwords.google.com/select/Ke...rceLegacy=true
Choose a developed website relevant to your Main keyword & Provide its link in the box provided.
In both the above ideas you will get lot of keywords.
Now extract them in .csv for Excel format.
Arrange them in a list format & sort out them based on various parameters.
Like:
CPC >$1
Global Search Volume > 10000
Advertiser Competition >0.8
Now you will left out with keywords that are on demand.
Copy paste them to Word Processor & Remove the blank space between the keywords.
Now, Go to - >
Special Bulk Pricing on low cost domain names
Paste the keywords & choose the extension you are in to.
Now comes the interesting part,
almost out of 100 keywords 99 of them are already registered in .com
95-99% registered in other extensions .net / .info / .org
if you are into .in, you can get around 50% of them & even more with .co.in's.
Choose the best of the available domains, that sounds good for you.
Happy Acquiring
I did my best to make it clear for all.
let me know if you have any clarification..
Edit:
Godaddy's Bulk Registration search is one of the best tool to search upto 500 domains faster.
To Register the available domain names, Mitsu.in & ResellerClub is good.
(They have promo running & it keeps the cost under $2 till September 2010)