If Tony Robbins were a crystal he would be pyrite, highly motivating and encouraging, this stone will help you follow your dreams and reach your goals.  This gold beauty blocks negative energies and will also be there for you in times of need to give you that extra boost of energy to make your deadlines, support your growth and basically get you from third base straight to home.
Pyrite is also linked to abundance, because let's be honest, when you've got this kind of motivation and support behind you, what can't you accomplish?