I grappled with the arguments for and against God's existence. What struck me the most was that there are laws of nature. I've mentioned several times on this blog that I find the argument from order to be a rather benign argument, but that it's also one with some tremendous implications. Nowadays I sum up the argument like this:
1. Whatever exhibits regularity is not the result of chance alone. (Premise)
2. The laws of nature exhibit regularity. (Premise)
3. Therefore, the laws of nature are not the result of chance alone. (From 1 and 2)
It was this argument that convinced me that the laws of nature are the result of someone's or something's providence. If it was due to necessity, then I felt I had an argument for pantheism. If it was due to design, then obviously I had an argument for theism. Either way, I knew I had to maintain some form of religious conviction. Even if it were due to necessity, there are enormous medical benefits associated with prayer and meditation that I felt I had to take advantage of. 
As for life after death, I became convinced by C.S. Lewis's argument from desire that, "If I find in myself a desire which no experience in this world can satisfy, the most probable explanation is that I was made for another world." I won't go into a lengthy defense of the argument, so I'll simply refer to any interested readers to Peter Kreeft's article. 
Lastly, I became convinced that Jesus was raised from the dead because of the transformation of the disciples' lives. They came to sincerely believe that Jesus had been raised from the dead, even though they had every reason not to. Again, I don't want to belabor this point, so a more detailed defense of this argument can be found in an article written by Gary Habermas. 
Anyway, I don't intend to engage in any debate in the comments section of this post. I simply wanted to share a little about my life experiences and why I've become a committed Christian theist.