Google offers a free keyword tool that estimates search traffic for different keywords. Take your ideas and put them into the keyword research tool. You can paste them directly from your spreadsheet. The results are given in two columns: Global Monthly searches, and Local Monthly Searches. Local means searches in the United States. Take note of terms with a high number of search traffic in the “Local” column and add them to your spreadsheet. Anything with more than 1000 searches are worth noting.
This tool also works as a keyword suggestion tool. Your results will display other keywords in the results that can be added to your list. Also, if you put your website address instead of keywords at the top it will return suggestions based on your current website content.