To Prince: fire the yes-sir team. Hire a few guys with criterion enough to give you credible feedback, so that stuff like "Purple & gold" or "Hot summer" never escapes the drafts section of the vault. Stop writing music for one year. Spend all your time playing live for low budgets. Focus on small venues and give the best tickets to longtime fans. Try to live on the current budget divided by four.
To Zapatero: resign as soon as possible. Put Rubalcaba as prime minister until the end of this period. Get Solbes back onboard as Economy minister, and show it as often as possible in international institutions. Let your party choose a good inheritor after Rubalcaba.
To the European Union: use this opportunity to stablish, once and for all, a truly authoritative, common European government. Put Felipe González as the first president and let him manage stuff for a couple of years. Then make elections and start acting like truly a common union rather than scattered, ungovernable little countries.
To Angela Merkel: never predicate for others the same medicine you avoided when you confronted the same problems the others have by now.