I just started my second all grain batch. The first one I made a bunch of small mistakes but by the end the beer was still drinkable. The biggest thing I did wrong was after I had small boilover with hops on the ground, I added more hops which I guess I shouldn't have done. I also started off with a low mash temp, which I ended up spending too much time to correct.
So far this time mash temp is good sitting at 152F.
Now I just have to make sure to watch out so not to have a boilover.