In this classic GameTek Geoff discusses some techniques for estimating things in your head.
Duration 6:19
📆 2017-03-12 12:00 / ⌛ 01:10:22
📆 2017-03-05 13:00 / ⌛ 00:06:33
📆 2017-02-26 13:00 / ⌛ 01:15:36
📆 2017-02-19 13:00 / ⌛ 00:06:18
📆 2017-02-12 16:51 / ⌛ 01:03:54