I am a great believer in the use of female intuition to make decisions. I have often used 'gut instinct' to make even major life decisions, to good effect. Another (more scientific)) option is to write down the potential pluses and minuses of a particular plan of action (eg. whether or not to stay in your current job)- and to compare the two lists. Sometimes it is good policy to delay a decision (depending on what it is)- gives you time to reflect and discuss options.

Just make a decision and stick to it, simple but it works. If you fail, get up and try again.