In this video I go over 5 mistakes that people new to Inkscape tend to make.
1. Trying to use Boolean operations on groups
2. Thinking a stroke is a path
3. Object disappears when using Union Boolean
4. Trying to modify Raster images
5. *Using offset instead of stroke for outset borders
*not necessarily a mistake, but might not give expected result
Plus, 1 extra bonus tip that deals with 'hidden' objects
PS. sorry for rambling on a bit near the end.