In the UK the major newspapers frequently have specials in relation to transport (coach / ferry trips) and holidays (caravan parks). You have to buy something like 6 newspapers over a 2 week period and then send off an application and you get the trip / holiday at a fraction of the standard price.
I don't buy newspapers and was wondering if there are ever any deals like this that I should look out for. I've never come across one but I thought I'd ask.
You're possibly not interested, but if you join Big 4, you can get discounts of 10% when staying at their caravan parks. If you do it regularly, or stay in their cabins, it pays for itself pretty quickly.