Let us say you have thought of a new category you want to place some articles in. To create this new category, go to one of the pages that you wish to put there, and add a category tag naming the new category to the end of the article, like this:
[[Category:Category name]]
...where in place of category name you type the actual name of the category. When you save the page, the category should appear on the bottom line of the page. If it is indeed a new category, it will turn up in red. But this does not mean there is no such category: it might exist but with a slight difference in naming. Before you create a new category, make sure it does not already exist. In a new browser window, click on Special pages in the toolbox menu on the left side of your screen. Then click on All pages. Pick Category from the Namespace dropdown menu, and then enter the name of the category. Look over the index for synonymous categories.
Once you are sure your new name is good to go: Click on the redlink, and then click on the article creation link provided in the instructions that appear on your screen.
You will need to put a parent category on the new page, and then save the page. Going forward you can put your newly named category at the bottom of pages that you wish to add your new category to. Categories with too few pages in them are usually nominated for deletion.
For boldly changing the AfD page to help keep articles out of AfD that don't belong in AfD. CelarnorTalk to me 18:43, 9 April 2008 (UTC)
The Original Barnstar
For your constant, very helpful guidance that resulted in GA on the wood turtle. Thank you.--NYMFan69-86 (talk) 11:45, 25 May 2010 (UTC)
The Mistagged BLP Cleanup Barnstar
This barnstar does not cite any references or sources.[1][2][3] For your work with mistagged BLPs, thank you! The list is now empty with your help. Gigs (talk) 05:42, 22 December 2010 (UTC)
The Invisible Barnstar
Your work about chess is well-known but this is the right Barnstar for your comments about how to help newcomers. Philcha (talk) 17:43, 26 May 2010 (UTC)
The Random Acts of Kindness Barnstar
For helping me out an uncountable number of times over the past year. You are an exceptional editor of the wiki! NYMFan69-86 (talk) 02:16, 4 December 2010 (UTC)
The Working Man's Barnstar
For your impressive work of assessment in Wikipedia talk:WikiProject Chess/Review on B+, B and B- assessments, I am very pleased to award you this barnstar. SyG (talk) 20:29, 7 March 2008 (UTC)
The Reviewers Award
A big thanks to your constant efforts on making the loggerhead sea turtle a better article. You made it possible for us to get FA! --TimHAllstr (talk) 00:40, 7 June 2010 (UTC)
The Reviewers Award
For all your help with Painted turtle. You truly are an exceptional collaborator. One who embodies the wiki spirit. Thank you, NYMFan69-86 (talk) 18:07, 24 January 2011 (UTC)
The Reviewers Award
Thank you for your diligent efforts to bring the loggerhead sea turtle to FA. We couldn't have done it without your help. Vancemiller (talk·contribs·count·email) 00:59, 5 June 2010 (UTC)
The Invisible Barnstar
When I saw "Awarded to users who make significant and helpful contributions [...] without seeking recognition or reward for their work," I thought of you. Truly phenomenal and tireless work over at Wikipedia:WikiProject Turtles, which would be nowhere without you SunCreator. NYMFan69-86 (talk) 00:59, 15 January 2011 (UTC)