https://postheaven.net/stantonkring7/building-effective-church-websites-with-seo
https://zenwriting.net/dean94bekker/how-to-find-good-keywords
https://jacksonlee32.kinja.com/how-to-find-a-real-seo-specialist-1837558915
http://jackson34siegel.uniterre.com/1016896/Google+Promote%2C+Remove+and+Comment+Feature+-+Effect+on+SEO.html
https://www.anobii.com/groups/01f8941ab7b38cda8c
https://foursquare.com/user/563951593/list/googles-new-algorithm-leaves-an-opening-for-compe
https://www.caringbridge.org/visit/lehmanmedlin75/journal/view/id/5d62d386c1f03e8346077fcb
http://b3.zcubes.com/v.aspx?mid=1404042
https://www.evernote.com/shard/s518/sh/283b08ae-e7ac-47a5-8a2f-c6ce860cb2a9/84fa74b5412478de5111b1542828aa91
http://reesellis71.iktogo.com/post/does-your-business-need-seo-specialists

Good keywords are frequently searched for (high demand) but not being targeted by many other websites (low competition). There are a number of tools out there that can help you find them.
Wordtracker
The best tool out there, Wordtracker is one of the most essential SEO tools. To use Wordtracker:
- Go to the Wordtracker website (http://www.wordtracker.com)and pay $7 for 24 hours' access
- Enter a keyword phrase you're thinking about targeting
- Wordtracker will suggest hundreds of related phrases - click on the ones you like
- Once you've clicked on all the phrases you like, run them through the program
- Wordtracker will compile a score for each phrase, based on the number of users searching for it and the number of websites targeting it
- The higher the score, the better the keyword phrase!
Wordtracker also offers a free service which works in the same way but only uses results generated from MSN.
Overture
Also useful, Overture's search term suggestion tool (http://inventory.overture.com/d/searchinventory/suggestion/), is free and much quicker to use than Wordtracker. It works in much the same way as Wordtracker but doesn't tell you how many websites are targeting each keyword phrase.
Google
Google AdWords Keyword Suggestions (https://adwords.google.com/select/KeywordSandbox) tell you which keyword phrases are being targeted by other websites.
Guidebeam