It's gonna depend on the body of water, what works for me, on my home lakes under those conditions, may.............or may not work for you. But, here is what I do:
#1 Fish ANY WHERE there is a light breeze (providing it's a fish holding area), slick calm water in those conditions is adding an extra thing that works against you.
#2 Heavy cover and shade.............that means thick grass and/or boat docks. They tend to be tight to cover, if not downright buried in it in on these types of days. Just "fishing around" this stuff won't get many bites from quality fish, you have to drop it on their nose.
#3 Downsize the bait, but not the weight......for example, if the grass flipping bite has been hot on "normal" sized bait (like a large profile heavy jig, or creature bait) I'll trim and thin my jig skirts, and use a smaller trailer (or smaller flipping bait if I am using plastic) BUT increase the rate of fall. Make them bite it by plopping it in their laps fast.
#4 If #2, and 3 are not productive, I head to deeper water,/off shore structure and cover with drop shotting, shaky head, or finesse football jig gear.
#5 If you can not buy a bite around cover.........fish for the dreaded suspending fish. I have fished for hours following my own #1,2,3, and 4 points of advice, only to haul water, and had to go after fish suspending outside of cover with a slow falling vertical bait like a wacky rigged stick bait, or letting a fluke sink painfully slow. Sometime burning a crankbait through these suspending fish will get reaction bites, but in my exp....you have to keep the bait slightly above them, or at the same depth they are holding,these fish seem very very unwilling to go down for anything below them.