Here are some more idioms which are based on metaphors. What is the idiom in each sentence and what does it mean?

1. Oscar’s going to be holding the reins while the boss is on holiday.
   holding the reins = in charge
2. It’s hard to know what to do when management keeps moving the goalposts.
   
3. Starting his own dry-cleaning business was just another of his half-baked ideas.
   
4. We’ve had to tighten our belts since Sam lost his job.
   
5. The company needs to take its customers’ criticisms on board.
   
6. Are you still on track to finish your essay by this evening?
   
7. Jana worked around the clock to finish decorating the room before her parents came home.
   
8. I’m sure you can take him at face value – he seems perfectly honest to me.