Very often, it's the irrational fears that arise in our minds that lead to overthinking.We fear what others might think, we fear to make a mistake, we fear not being good enough to succeed. And living in that fear will tangle us in a well of indecision.

Roman Stoic and Philosopher Seneca said:

"We suffer more often in imagination than in reality"

Fear, which often stems from the imagination of "what might be", contributes to your overthinking. And one of the best strategies to beat fear is to simply take action. Take a small step in the direction of your fear and see what happens. The moment you take action is the moment you win a battle with your overthinking. Win more battles with more action.

As Napoleon Hill, author of Think and Grow Rich, writes:

"Fear can be effectively cured by forced repetition of acts and courage"

When I'm overwhelmed within indecision, I usually ask myself: "what's the worse that could happen?"

And when I've figured out what that would be, I spend some time thinking of a contingency plan. This gives me the confidence to take the action I need and note be afraid of it.