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Check the complete "Dimensioning best practices" article and download the free eBook here https://sourcecad.com/dimensioning-best-practices-mechanical-architectural-drawings/

Here is the table of contents:
00:00 Introduction
00:49 Don't Duplicate dimensions
01:46 Dimension views showing part clearly
02:23 Avoid dimension with reference to hidden line
03:29 Largest dimension should be furthest
04:16 Dimension as per manufacturing method
05:00 Never intersect dimension lines
06:12 Use ɸ for diameter and R for radius
06:59 Extension lines should not start from part
07:44 Add extension line on the nearest point of the view
08:20 Drawing lines should not be used as extension line
08:52 Never show hidden line in isometric view
09:50 Use leader with a note for chamfer
10:45 For hole dimension mention manufacturing method
12:24 Location of the hole to be labelled in view where it is a circle
13:37 Avoid TYPICAL notation
15:03 Avoid leading and trailing zeros in specific situations
16:21 Don't assume any dimension
17:34 Avoid placing dimension on the view