[adrianN]

Keep interviewing at new companies, switch companies regularly and demand 15-20% more each time.

[skc]

This is definitely the quickest and most effective method if making money is your only goal.

But once you reach a certain salary ceiling you might find that you're stuck at a company that you don't really like other than their pay.

[faissaloo]

How often is 'regularly'?

[adrianN]

Every 2-3 years, give or take.