Congratulations! You have the formal letter of offer for your exciting new job, and are ready to sign on the dotted line. However, a warning! It's easy to get swept away because the organisation has chosen you, against potentially hundreds of other candidates. Be careful you have done due diligence on your soon-to-be employer, prior to putting ink to paper.
Company Values
Confirm the company's values are in line with who you are and what you believe in. A couple of times in my life I have not followed this advice, and ended up in a great job, but having no belief in what the organisation was trying to achieve. This disconnect can only last so long, until you either chose to leave, or sacrifice your own values.
Family Values
Will you be frowned upon for choosing your family over work? Don't get me wrong, a job has to get done, and sometimes means a Saturday, weekend conference or work night. However if this is the rule rather than the exception, you will need to sacrifice something, and if this is your family, your heart is in the wrong place.