>>What would be the way to select 14 random records from a table?
>
>select top 14 * from myTable order by NewID()

This probably was not a very good advice, as

;with cte as (select top 14 ID from myTable order by NewID())
select T.* from myTable inner join cte on T.ID = cte.ID

could have been better.

Check http://sqlblog.com/blogs/paul_white/archive/2011/02/23/Advanced-TSQL-Tuning-Why-Internals-Knowledge-Matters.aspx