Google adward is best keyword research tool, in this tool you find lots of keyword related to your site.
using google keyword tool you can find good keyword first type your product name and search then google keyword tool shows some related keywords then you take from there some medium search keyword and use it will help you to quickly index in all search engines
The best way to research keywords for your website is Google Ad-words.Search your relevant keywords for your keywords from these really nice tool.I always use Google Ad-words for researching my keywords.
Google keyword tool is best for Keyword Research.Here you can find appropriate keywords for your site.
There are free and paid tools that you can use in keyword research but there are still steps you can do. 1. Prepare a list of relevant keywords that are related in your niche. 2. Use keyword research tools 3. Narrow down your research 4. Think like your reader - put yourself into the shoes of your prospects (I just read it in Professional SEO Solutions.)