Errgh.. I just replied, and it went somewhere?!?! Here goes for the second time ;p
Wow.. That is a pretty open question and in shorty my answer is yes, I wholeheartdly believe..
What happens is another story, and I will try to make it as short as possible
I believe that prior to birth everyone has a "life path"(contract) that they have agreed upon~ signed, sealed & delivered
Including, but not limited to kids~how many~sex, carrer~ what kind~ how many, marriage~ how many etc... Everything and everyone you "Allow" (<-- being the key word) in your life.
Anddddd.....
If you veer from "the path" there are again, pre-determined consequences (agreed upon birth~in the contract) and how much time you have to do on the "long cut"(sounds odd, putting that into words, but thats what it is, its a longer way to get to where you are suppose to be) opposite of "short cut"
Andddddd x2....
About the people in our lives, they are def ones from our past lives.. Have you ever noticed how you feel instant connections with some, and others you just want to turn and run from?!? All you have to do is pay attention to what your body is telling you~ be more aware of you..
So, what you come back as, with and what you will get in this lifetime has been decied before birth.
As for good and bad deeds, thats Karma it all comes back at you ten fold~ in this life time... Remember life is all about learning lessons, the lessons you get from this life, you take to the next, again all about paying attention to what your body is telling you about situations/people etc...
Not sure I answered you directly, but indirectly, I did... That was as short as I could make my beliefs