Oh man... I'll try to be helpful here, instead of the sarcastic and condescending remarks you are bound to get with questions like these. There are some really good tools and helpful tutorials and how to's available on the internet. Google and Youtube for starters. Some boxing websites, rossboxing.com and expertboxing.com to name a few. There's a wealth of information for very basic boxing techniques and questions that you are looking for. Most of the posters here will not waste their time regurgitating stuff that is readily available in articles and videos. When you have more advanced questions or discussion items, you'll probably get more productive replies. For basics, i recommend those sources. Good luck in your findings.
Combos are more effective when: 1) you mix them upstairs (head) and downstairs (body) 2) you mix under (uppercuts) and over (hooks and crosses) 3) you double up a punch in the middle of a combo (jab-right-double hook-right)
jab, headbutt, kick to the nuts, knee to the face, round house right after the knee when his face is in the air. You get an automatic K.O.
lol....this sounds like the actual combination that Jesus Rojas landed on Jorge Arce a couple of months ago. Headbutt + low blow + kidney shot + behind the ear. [ame]http://www.youtube.com/watch?v=BWpk8YY-FGE[/ame] Skip to 4:15 for the slow mo replay.