<ol>
<li><p>Get 5s on AP tests. If you want more info, a member called cupcake knows a great deal about studying in the UK (this actually applies to all four… s/he usually hangs around the Study Abroad section).</p></li>
<li><p>Universities in England generally only let you pursue ONE discipline. In your case, it would be economics and nothing but economics. Scottish universities are a good deal more flexible, although still more concentrated than many in the US.</p></li>
<li><p>There is one and only one standard application; UCAS. If you only apply to a single university, you might be able to do it directly (I know you can with St. Andrews), but for multiple universities definitely do UCAS. The fee for more than one is £17.</p></li>
</ol>
<p>Now might be a good time to learn the difference between Britain and England… :)</p>