Have you got a bright idea?

Thursday is National Ideas Day. This is your chance to make life better for all of us.

Ever had a great idea? One so great that you are convinced at the same time of its pure simplicity and your own genius?

The chances are most people at some time will have a startlingly good idea. Yet how many get the chance to see their idea become a reality?

BBC director general Greg Dyke and his yellow card

Even here at the BBC, ideas to make things better are very much in vogue. The director general, Greg Dyke, has even offered staff yellow cards saying "Cut the crap - Make it happen" for them to bring out in meetings should anyone be obstructive to good ideas.

Thursday is National Ideas Day in the UK - and we are giving you the chance to share your sparks of inspiration with everyone.

Submit your ideas now. We will take some of the most imaginative and original ones and on Thursday give everyone the chance to vote on which is the best.

We'll take the winning idea and put it to an ideas expert (yes, such people exist) and see if could stand any chance of becoming a reality.

In particular, we would like ideas on any of the following subjects:

• How to make your workplace better
• How to make the UK's transport network more effective?
• What low-cost gadget would make life better for everyone?
• How to prevent mobile phone theft?
• How to get people interested in a Jubilee street party in your area

Ideas on other subjects are, of course, welcome too. Send them all using the form below, and come back to the site on Thursday to see if yours makes it.