If you have just started home brewing or have homebrewed for some time now and have not checked out http://braukaiser.com/wiki/index.php/Braukaiser.com , you are missing out on some really good info! I owe a lot of usable brewing knowledge to Kai. His Wiki page has many great ideas on it like the one listed below –http://braukaiser.com/wiki/index.php?title=Fast_Ferment_Test
This test makes great sense if you are an all grain brewer. It will tell you what final gravity to expect when fermentation is complete. Reasons to know your final gravity: 1). It will give you an indication of where to start troubleshooting (be it fermentation problems( i.e. Yeast issues,) or a less fermentable mash (i.e. Mashed too high) 2). It allows you to know when to bottle and leave some fermentables left in the wort for good carbonation. The latter being especially helpful for lager brewing. All of this is covered in his article. An excellent read and like what he said in the article, “Interesting enough, most of the very experienced American home brewers don’t use this test …”. Well said. It’s a very good and simple test that can be done easily.
If you find his blog, he does not update that very often, mostly once a month on average, but it’s still good content to read. So check it out.