Applying to university is very, very fun. I've not had this much post... ever! Even if you're not going to go to uni, I thoroughly recommend you apply. For £15, you too will feel truly needed in the world.
I would say that you should apply to a more unpopular course. The less people doing the course, the more mail you'll get. It's an inverse proportion, if you like:
Number of Applicants = constant x 1/Amount of Post
Not sure what the constant is; I wouldn't have had to use it if I could find the 'proportional to' sign in the character map. Maths is far too popular a course, while we're here.
I've applied for chemical engineering. Last year, 900 people in the country applied to do it. 18 universities provide it, but this number is dwindling as the funding isn't there any more. Since I sent off my UCAS form, I've had a letter virtually every day, which makes me feel rather loved. I've been invited to 5 open days across the country, and at the two I've been to so far, I've been provided with lunch and guided tours.
If you want the world to notice your existence for a while, this is definitely the best way to do it. It's not illegal, you won't get fined if you don't go in the end, and the food is good. Plus it's all really fast as it's completely computerised.
The moral of all my waffling? A lot of schools are really keen for you to apply to university. Mine sure is. Don't skimp on it though, it's fun and relatively inconsequential. You never know, you may actually decide to do the course!