There are few rules that I follow...
Avoid bias edges whenever possible
A consistent seam is very helpful in constructing quilts
Try to remember to change needles and rotary blades before they cause problems :roll:
Interfacing can make quilting much easier when using stretchy fabrics
Just because someone says a technique/block is hard to make/do, isn't necessarily true
A clean machine causes less problems than a lint filled one :wink:
Other than that? I have probably broke more rules than I have ever dreamed of following LMBO :D:D:D