I do a lot of sniffing around different boards looking at "old" posts for info.  Here is a little snippet from 2009 regarding knots.  I never really give my line much thought while out on the water but found this very applicable.  I can certainly reflect back on breaking off snags or fish and finding my line is usually as described.  It makes me wonder if I should add another wrap or two to my knots.  I am pretty exclusively one that uses improved cinch and blood knots.

. Q. were you wetting down the line prior to dressing the knot?.and im willing to bet when using the 5xflouro tippet and tying the blood knot with 4 turns did it have a curve at the end of the break?meaning it broke in the actual knot and not at the hook eye?and if that was the case the knot was actually slipping out of itself priror to breaking. I have found that when tying 5x flouro in a blood knot after wetting the knot priror to dressing that 6 turns or wraps is most effective. anything less you get the curved or bent end of the break.signifying that the knot slipped befor it broke. I only say this because I love knots and have taken a few classes on them,Mandated classes of course. but I instantly fell in love with knots and how they react under stress.