Having played Napoleon in a skit on stage as a student, I have pondered this question a lot, of course.
- End the Continental Blockade. It hurts me more than it hurts them, I agree. Instead, I let experts envision a plan to develop trade and industry within Europe as swiftly as possible. How useful would a trade-union, a common currency be?
Letting go off the Continental Blocakde would also help solving the following problems:
- Do not annex silly things. The German North Sea Coast....the Illyric Coast...Barcelona.
- Give Holland back to Louis. He is a good man. Maybe add the stretch from Wesel to Hamburg to his kingdom.
- Find a rapprochement with Russia- which shouldn't be too hard without the blockade.
- Play on the defensive. Consolidate. Try to work with a Grande Armee which is as small, experienced and taxpayer-friendly as possible. This only works as long as there is no war with Russia.
- Deal with Spain and Wellington there once and for all. Use the whip, but do not forget the sugarbread.
- Propose peace to Britain (on my terms)....again and again and again. It looks good.
- Build a fleet and make sure it is decently equipped and led. Don't rush things. You might not live to see the French fleet beating the Royal Navy. But be sure you laid the foundations for it.
- Don't dream of Sea Mammals.
-If Russia is not placateable, use a different plan than the silliest imaginable which came to my mind in OTL:
- Build up three equally strong armies of 120 - 200,000, allow your two best generals to lead two of them. All 3 armies have a French majority of troops.
- Left wing goes into the Balticum and drags the Prussians with them. Let Friedrich Wilhelm III know that the Lands of the German Order will be his if this wing reaches St. Petersburg. With the ACTUAL capital threatened, the Russians will not that much dare to peaster the other advances.
- Center goes after Moscow, but should be flexible.
- Right wing goes into the Ukraine. Maybe some local elites can be found to support one of my siblings as a King of Ukraine, otherwise expand the Grand-Duchy of Warsaw as far as feasible.
- Entice the Ottomans and the Swedish to join. Give as many concessions to them as they want.
I shall never forget that I cannot destroy the Tsarist behemoth. But I can try to push it away from my Continent as much as possible, maybe to the borders of the time of Peter the Great.
-If Prussia ever rebels - break it up and put the rest into the Confederation of the Rhine. By the way, reorganize it to placate AND control German patriotism.
-If Austria ever rebels, break it up.
-Find a concept for the "King of Rome" idea.