• Jab-Cross
• Jab-Cross-Hook
• Jab-Cross-Hook-Uppercut
• Jab-Cross-Jab
• Jab-Hook-Jab
• Jab-Cross-Uppercut
• Cross-Jab-Cross
• Cross-Hook-Cross

Basically what you want to do is mix up as many combinations as you can without feeling unbalanced at any time. You want the punches to flow from one to another. Keep in mind that you can switch between hands or use the same hand twice high or low.

• Lead Round-Lead Round (High/Low, Low/High)
• Rear Front-Rear Front
• Lead Round-Lead Side
• Rear Crescent-Rear Round-Rear Spinning Hook
• Rear Round-Spinning Back
• Rear Round-Rear Spinning Hook

Just like the punches, you want to mix between high and low and rear and lead.