Some actions are too random and sometimes out of the right moment. you have two main paths
Laura
Marcus: reject Laura twice
There can't be a walkthrough, here is an example:
First time installing the game, when you peep in the toilets, you see the full scene, I mean the mother's bare bum
Try to begin a new game, you wont have the full scene.
You can cheat the stats (see above) but you can't avoid the grinding....Events such as Sarah in hospital can't happen before day X etc.
The one thing you can do is hour after hour visiting all the location in order to see if anything happens....and I agree : it is a lot of grinding for very few rewards.