The balancing act - 5 key challenges
 

What are the five key challenges faced by entrepreneurs today? I am specially interested in hearing from pre-revenue digital startups. In my case:

1. Funding (cash flow) - this seems to hold the key to everything
2. Resources - tied to (1) above - you cannot keep getting work done free of charge for long
3. Revenues - vital to get to a position where revenues can be generated quickly
4. Product - need to get to a full launch quickly
5. Scalability - need to be able to scale quickly

What about you?