The tips begin at a different place in each module. The advice moves along with the stages of the course.
If you're stuck leaning towards an answer, but aren't sure, make a choice and then put one of your 'get out of jail free cards' into the hat. If you have more time to spend on this particular question right now, you will have time at the end of the section. If don't have time at the end, you really don't have time now. Congratulate yourself when you play one of your get of jail free cards! If you don't put a few of these into the hat you're doing it wrong.