thanks for starting this thread, champs.
Definitely agree it would be nice to see more competitions for mumsnetters as people - whether the prizes are pampering or practical.
I assume you have approached the companies who advertise on the home page? vouchers from any of them, but especially the biggies, like Tesco and John Lewis, would be really useful.
Vouchers from H and M or other high street clothing storas would be good. Also theatre and cinema tokens.
If possible, when the prize is for an event, activity park entry etc, could you get the prize-giver to include one night's accommodation at a travelodge or something? Travelling long distances in a day with children is difficult, as we all know! Also if accommodatoin is included, mumsnetters who live further away from the venue can enter the competition.
Lastly, I agree with marthamoo that sometimes the conditions for entry a bit exclusive. Anyone who goes to the library can enter a book or video review. Recipies and parenting tips are easy for anyone to enter as well. But being able to send in a holiday and product review depends on your being able to afford the thing in the first place.