Next time you're offered a raise, a promotion or even a new project, test the boundaries by asking for an increase over what's being offered. And don't forget about all the extras, such as tuition reimbursement and vacation days. By looking at the total package, you may find even more room for bargaining. You must start the ball rolling. Although negotiation is adversarial by its nature, it can still produce a win-win solution.
Negotiation works best when there's mutual trust between both parties.