I reckon planning's the one on the left...
Here at AdGrads towers, we've been told a little about two new opportunities, both of which you should consider applying for if you're trying to get into the business:
1) IPA Summer School
The IPA (in conjunction with many agencies) run a Summer School, aimed at getting talented graduates into the business. The main link is here. There are two streams you can apply for, account management/planning and creative.
Both streams close on the 15th of April. Get applying.
2) Ogilvy Planning Fellowship
This is that rarest of rare beasts, a Planning specific introduction to the business. Details are here. It closes on the 14th of March at midnight. If you have any other queries, get on twitter and talk to the Ogilvy Fellows.
Best of luck with both of them.