A quick way to jump between start and end tags in HTML or XML (or any supported pairs including begin and end structures in C/C++ and other languages) is to use the find_matching_paren command, bound to Ctrl+] in CUA emulation. When the cursor is on a start tag, press Ctrl+], and the cursor bounces to the end tag. Press Ctrl+] again, and the cursor bounces to the start tag. This can be useful, for example, if you're in a large XML file and need to see what section comes next.
