Before you make a big decision, don't only ask, What do I want?

Ask yourself this instead 

Am I choosing this because I genuinely want it, or because I'm tired of my current situation?

If nobody knew about this decision, would I still make it?

Am I running towards something, or simply trying to escape something?

What will this decision cost me, not just financially, but emotionally, mentally and with my time?

Can I actually afford the consequences if this doesn't work out?

What am I giving up to make this choice?

Am I making this decision because it makes sense for me, or because I'm afraid of disappointing someone?

What does my life look like six months from now if I say yes?

What does it look like if I say no?

Am I ignoring something important because I really want this to work?

Have I looked at the facts, or am I making this decision based mainly on how I feel today?

If this involves another person, have I paid attention to their behaviour, or am I making decisions based on their promises?

And one more:

If I were advising someone I love in this exact situation, what would I tell them?

Sometimes you already know the answer.

You just need to be honest enough with yourself to admit it.