I can’t remember how I stumbled on this site but Ideas4all.com is a rather good site designed at encouraging inventive and creative thoughts and ideas across the globe. It appears the site is of Spanish origin but about 50% of contributions are in English and you can use a Google translator for the remainder.
Keen to give it a go, I registered (for free) with them before submitting one of my ideas. I used the joule thief idea (see previous post) and it wasn’t long before people were reading my idea to recycle discarded batteries. People also get to vote as to whether ideas are good or bad and at the moment I have two thumbs up.