I like Google keyword tool on Google Adwords, for that purpose. It gives you different options according to your search terms.
Joshua, do you mean you don't know how to use the keywords tool or keywords in your articles,blog posts etc?
Find the keywords using Google External Keyword Tool. Select the best ones that match your niche and use them on your posts. It depends on how you mention the keywords but make sure it reads naturally.
Use Google Adwords tool to analyse your keyword and take help of google webmaster to know more about your keywords and its usage
These are words or phrase which people would insert in a search engine to look for information controlled in your site. The search engine spiders take those words and display the best sites that relate to that in a row. Depending on the acknowledgment of the word, you may have a million or more web sites to choose from.
Many time we can not choose right keywords or don't know which keywords best for business or site. Everyone faced this problem. I have very simple solution for this problem. We can choose very basic key phase for new sites or can used long phase keywords for site. It's really help to us.
Use Keyword Research tool for your keyword selection after that make them use in your Meta Tags and Title Tag.