One of my favourite places is BlogPackingLight, which is an absolute mine of information, and innovative solutions to a variety of backpacking problems.
They’re all easy to do. A few of them involve the use of bits and pieces that can easily be purchased from Bob and Rose at backpackinglight.co.uk, but none of them are expensive, and Bob and Rose are so quick at sending things out that they normally arrive in the following day’s post. (Well, in fact things have *always* arrived the following morning when I’ve ordered from Bob and Rose.)
So! If you have a Laser Competition then haste ye over to BPL and check out those suggestions. Hasten there even if you haven’t got a Competition, because there are all sorts of other clever and interesting ideas for all of us who go camping.