An important aspect of search engine optimization is the use of keywords. Keywords can greatly improve your rankings on search engines. Keywords that are not competitive don't receive many searches.
Here these are some keyword research tool:-
Word stream
SEO book keyword tool
Google Keyword Tool
Wordtracker
Keyword Discovery
SEO Book Keyword Research Tool, etc.
Tools such as Word Tracker and Google's Keyword Tool can help your determine which keywords you want to optimize.
I use Google Keyword tool, Word tracker tool, Word stream, SEO book keyword tool etc.
Remember certain tools are paid but you may use the trial version for some days.
Sometimes free stuff is the best, same for Google Adwords Keyword Tool.
If you want to save some time and save your progress I suggest you try Market Samurai.
google adwords keywords tool
Genuinely I use https://adwords.google.com/o/Targeting/E... and http://www.submitexpress.com/keytracker.... tools for choosing appropriate keyword for my website.
i was doing seo for 6 months but my keywords are not getting indexed. Can anyone pls guide me to get good keywords