I have always gone with the idea..know what your jig fells like....when it dont feel "normal"...pull up just a tad...feel for resistance..nail him if you do. Next is watching for line movemnt. Most jig hits are on the fall so the line movemnt should be noticed first...also--you can help yourself if you have a braid line, qulity fast tip rod with lots of backbone and blank that goes ALL the way through the handle...that way there is more out there to transimit the strike so you can detect it.