I decided to do a SQL Advent series of posts this year as well, this year I will focus on best practices. In case you are interested in last year's posts, all of them are listed here: SQL Advent 2011 Recap

Here is what the 25 posts will look like, the order that the posts are listed is not the same that they will be posted, I will randomly pick and choose

1 Data types storage differences
2 Sargable queries
3 Recap
4 Triggers, what to do, what not to do
5 Sizing Files
6 Benefits of Indexes
7 Foreign Keys
8 Standardized naming conventions
9 Don’t trust the designers
10 Lack of constraints
11 When to say no
12 Features enabled that are not used
13 Maintenance
14 Proactive notifications
15 Reinventing the wheel
16 Loops and cursors
17 Lack of database design and normalization
18 Use the new features
19 Stay relevant and marketable
20 Get the tools you need to be more productive
21 How to get help
22 Testing a backup strategy
23 No matter how long you are on the wrong path, go back
24 With VLDBs it matters what you do and how you do it
25 How to improve your tech skills

Let me know if that list seems fine or if you would like to see something else, also let me know in which topic you have absolutely no interest in