Big Stock Photo is the fifth stock photo website I got into, in Fall 2009. Their photo submission page is one of the easiest to use.
Check their contributor’s page for some great suggestions. Also check out their most popular search phrases this week.
When you are ready to submit your photos, go to their Sell Your Images page. You’ll create an account, go through their contributor tutorial, then you’ll be able to the upload area and submit ten photos for consideration.
Good luck!