Proper shroom placement is something common most new teemos mess up.
Think about when you play...
-Where do you tend to walk alot?
-where to you tend to not walk alot?
Those 2 questions mean the differece of a good place to put a pink ward that'll never be found, or a good teemo shroom that will always be stepped on.
Pathfinder can be your friend, people use it alot. So path find to an area, and while it path finds.. place a shroom
#4 seconds away from each other. Your mushroom's damage doesn't stack, only reset.
**Sometimes the best place isnt always the bush as manny people expect them to be there... **they'll skim the outside of the bush but never go in there especting a teemo shroom. If you place it in that small area outside the bush, they'll run into it.