I forget his name but a current level designer recently posted in his blog how he prepares to make a level before hand. One of those ways is collecting various concept art designs and later going back to them for insperation, I thought I would try and follow suit, I have been working with hammer for roughly a year+ and want to know what you think I should add/remove.
If there are any tutorials on things you think I should learn, point them out for me, that would be awesome.