How do you handle the "salary requirement" protocol in Job Searching? (Details inside)

Today I read an extensive article on the sole subject of negotiating salary throughout a job search process. One consistent rule noted in the article was to avoid divulging your ‘number’ without an offer on the table, and try to ALWAYS let the employer offer their number first.

This is a strategy I can get behind, but I’m finding that the vast majority of companies place instructions in their job postings that require applicants to submit certain items (resume’, cover letter, etc). One of those items is almost always “Salary Requirements”.

So how can you go after those jobs, and stay within the guidelines of smart salary negotiation at the same time?