1. Decide if it´s a mission craft, or a multi-purpose craft. 2. Just randomly start sticking parts together and get pissed that I don´t have enough budget. 3. Make the rocket less awesome and more budget friendly (Also, making it budget friendly makes it a lot safer) 4. Try it. 5. Watch the pretty Explosions. 6. Quit the game for 10 minutes. 7. Go back to Step 2 until it doesn´t blow up anymore. 8. Be happy and go back to Step 1.