Changing careers may sound like a dream if you feel bored or dissatisfied with your job, but it's not something you should take lightly.
"Shark Tank" investor and business icon Robert Herjavec says before making any big moves, you should sit down and seriously mull over what it might mean for you.
In his recent book "You Don't Have to Be a Shark: Creating Your Own Success," Herjavec recommends considering the following:
In order to know where you want to go, you have to figure out where you are now. Herjavec recommends considering your age, health, education, responsibilities and economic status to help you figure out how easy or difficult a change will be.
"You can still — and should — believe in yourself," he writes. "But now you know where you are and how far you have to travel."
In order to avoid day-dreaming, ask yourself tough questions like, "Am I ok with a lower salary or job title?" and, "Do I know what I have to do to shift gears?"
"Know what it takes to make you happy and admit your limitations as well as your goals and skills," Herjavec says.
Voicing your concerns and discussing your plans with a few confidants could help you figure things out.
"If you are close to someone who once made a change similar to yours, talk to them about the way they handled their concerns," he recommends.
Having a plan B is important.
"The path to success is rarely straight and short. It includes turns, switchbacks and detours," the investor writes.
Disclosure: CNBC owns the exclusive off-network cable rights to "Shark Tank."