I can give you my personal tells if you like.
Call or raise almost instantly= Im trying to tell you im strong but I am not strong , OR I just sneezed, hit the wrong key and likely had no intention of calling or raising anyway. Proper action for you = you should just fold
Call raise or check after 10 seconds but before extra time = Im likely thinking about how to extract the most money from you with my monster hand. This has the added benefit of also looking weak and callable. OR it could mean that my daughter has just flicked a green bean against the back of my head and ive turned around and lost focus for a moment. Proper course of action here is also to just Fold.
Call or raise into the extra time bank= There is NO DOUBT this is a slow play every single time. There is nothing to think about here. I either had a big hand all along and am slow playing for value, or I hit my draw and am slow playing for value, or the flush and 4card strait just hit the river and im slow playing just to make you wait on your money, OR ive gone to the bathroom and my wife is now playing you with my hand and she is still deciding what 5 cards she is allowed to use and is googling "whats a good hand" and its taking some time. The Proper thing to do here for SURE is the just FOLD. If its me im not
bluffing.......if its my wife it doesnt matter because she is to dang lucky to lose.
Sure hope this helps.