I know this is one of the most popular soft plastics, but tomorrow i'm going fishing on a heavily pressured lake and was wondering how I should fish it.

There are probably as many ways to rig a senko as there are colors of senkos. I guess on a heavily pressured lake I'd try to wacky up some fish.

Be advised that a senko isn't really a search bait, so it's better if you've located an area that has fish on it. No matter which way you rig a senko the best way to fish it is slow, you don't want to overwork it. I've heard guys say that not working the bait at all produces fish for them, but to me a senko works when your cast lands on top of where the fish are so that the bait falls in front of them (don't forget about any current that will affect where the bait falls) because it's the falling action of the bait that gets them to strike.  Since bites are most likely going to come when it's falling be sure to watch your line very carefully. Good luck out there

I use senkos mostly when I feel fish are tight to structure and fairly inactive. It is very subtle and I don't have to move it far to make it work so I can keep it the strike zone for a very good amount of time.