Put all your disposable income into lottery tickets until you win ;)

Alternatively, wait out the property price boom, move to a cheaper city (eg Stuttgart over Munich), etc.

If none of those is acceptable, I am always surprised at people not seeing things that can be improved: I usually struggle to decide which of the hundreds of ideas to pursue first, and how can one best monetize it while keeping my principles unscathed (free software mostly). Talk to others in your region about what they think might be missing to make their life easier.