This a great question. And there are many reasonable answers including the one you gave yourself. But the answer to this question really depends on motivation.
My motivation is to get the atheist to seriously think about his/her belief system.
Most atheists "I believe what I believe because I believe it" That is the root of their apologetic.
My personal favorite is to take interest in what they believe. Keep control of the conversation by asking questions. Many will say they believe in evolution.
Me "Why do you believe in evolution?"
Atheist "Answer "Because of the scientific evidence"
Me "What evidence do you have?"
At this point it gets to complex to type out. But you can see how I am pursuing what they think to its full conclusion.
More often than not they will eventually will feel like they should ask you what you believe.
And that is where I will use creation science.
You may have already heard about this but I want to share it with you anyway.
(Links will be added soon)
Great place to begin building an arsenal of scientific evidence for the bible account of creation. You can get a real good feel for what they are about.
But here is the nice thing. The family that started the ministry has set copy write rules that go like this. "The mission of salvation is more important than the money"
That means free to copy and give. So here is the next site.
(Links will be added soon) You can download many many of the video's for free and legal.
Build your apologetic the bible says be prepared to give reason for your faith.
I believe in the bible for this reason
Personal conviction and experience.
Science shows proof of creation.
Science written in the bible is just now being discovered (YHVH rolled out the heavens etc.)
Biblical Archeology (Sodom and Goromorah was found Egyptian chariots in the red sea etc.)
Biblical prophesy that has come true. (Isiah predicts Yeshua thousands of years before he arrived including things he would do) The detail was so great that a normal man could have never been able to read what Isiah wrote and then follow it"
Find what interests you and build an apologetic.
Over the internet, I see many atheist blabbering about how strict and cold Christians are when talking about proof of the faith. And that they always end up by saying that Christians always end the argument saying "YOU'RE GOING TO HELL!!!" Personally, I think that's just our infamous side. Most Christians who spread God's word and talk about it almost forget what God says when they argue with an unbeliever.
Instead of continuing the argument you can shrug them off and ending with "have a good day and God bless". That's a more respectful way to treat another one. Correct me if you must if you think I may be wrong or missing something.