I have been personally stuggling with this part of riding for some time now and here is what advice I have found actually works. As said above, look where you want to go not at your front fender. Example: in a left corner, press down on the right foot peg with majority of your weight, at the same time press your right knee hard against your tank, this lowers your center of gravity on the bike as well as adds to rear tire traction. Slide forward on the seat until your peanuts are touching the tank, this gives weight to the front tire (more traction). Slightly shift your arse to the right side of your seat while keeping your upper body more vertical then the angle of the bike, again this balances the bike better. Last but not least, on a 4 stroke for sure, do all of your brakeing before entering the corner. Once you have slowed to a comfortable speed begin turning with the gas being re-applied, once your bike begins to straighten out of the turn, hammer the gas.