Some religions like to soften up the 'rules' by saying they are 'guidance' and of course you are free to to choose your path. Some religions take it to an extreme and use it as a blunt instrument to control or persecute people - quite often, their own believers!
Either way, eventually, if you don't follow the rules, you don't go to heaven - which means you go elsewhere. Nasty.
Nice way to live your life. Trying to follow the rules of a perfect being. Of course you CAN'T. Because YOU are not perfect. YOU will make errors of judgement. YOU are a deeply flawed individual. YOU have been corrupted by all the nasty little temptations in life. YOU may have even listened to
Us atheists eh? Look at us, living our lives without worrying about whether we might upset god(tm). Using our OWN moral judgements, considering what effect it will have on others around us, ENJOYING life, freethinking, gasping with wonder at the universe - the chaos - the very LIFE! Hey, we don't even have 'self worth' issues about having a common ape-like ancestor - we revel in the fact that all life is linked. We don't need fairy tales to help us understand the 'difficult' science.
But if you are a believer in whatever plethora of gods that really most likely don't exist, don't worry about it.
Those damn, happy atheists will not be laughing when YOU prove them wrong. When you have lived a flawless life. Given up your gut instincts and followed someone else's moral code. Picked the ONE TRUE religion (or splinter group of that religion) out of the tens of thousands. Chosen how EXACTLY how to interpret the holy book and know which phrases did not really apply and reinterpret some phrases so they are more convenient for you.
You KNOW there is a true god(tm). So you simply can't be wrong...
Personally, I'll remain a damned, happy atheist, than you very much. :-)