Get rid of the daisy-chained extension cords / power strips.

As you're doing that, notice if they're warm from the electrons coursing through them. (They should never be warm.)

Replace with the shortest cable that will reach, of the heaviest gauge you can afford.

Definitely, try to split up your electrical load. Different breaker circuits are better, but even running to different outlets on the same breaker will spread out the load / heat some. Giving the electricity as many paths as possible can lower the total 'resistance' to current flow. (So does keeping the path as short as possible, and the wire as fat as possible.)

If you're running those lights you were inquiring about in your other posts, you should have a pro look them over. Fire safety is not where you cut corners. :hippy: