Fishing high pressured waters varies depending on what is causing that pressure and whom. Most lakes today are pressured on the weekends by boaters, skiers, and the onslaught of weekend warriors. If this is the pressure you are speaking of, then, it is easy. Bass will be simply be holding tighter to cover, so you will need to slow down, and pitch or flip lures into the weeds -- instead of working the edges. Back under docks, instead of working the posts.
However, if a lake is a tournament lake -- one that holds tournaments on a weekly basis -- that is a totally different type of pressure. Bass that typically hold on shallow cover and structure, will stage a little further off shore, or move out to the first major break in deeper water.
Let me give you an example: During the week you have found some bass holding along the weedbeds in 3-6 feet of water in a cove. But you go there on the weekend and they are gone. There is a good chance they are not gone, they just moved to the cover and structure towards the cove channel (center of the cove in the deepest water, depend on depth: focus on the 18 to 25 foot if the cove is deeper than 25 feet, unless there is a thermocline, then you just need to fish the thermocline edge and where it meets cover or structure, i.e., outcroping, boulders, rock, standing timber, etc.). If you found them on a flat, then move out to the first major break and work it.
Finesse lures and presentations are always best in high pressure situations. weightless/weedless Senkos, dragging tubebaits, small Texas rigged Craws, and 1/8-1/4-oz finesse jigs and a big pork chunk or trailer (ultra slow fall) are all good choices.
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