Prepare the listener for change
A short drum fill, a one-beat pause or a rising texture can build anticipation before a new section. Match the intensity of the transition to the moment that follows.
A subtle change is often enough when the beat is already dense. Reserve dramatic effects for major structural moments so they retain their impact.
Create contrast with subtraction
Removing the kick, bass or lead melody briefly can make the return feel bigger without adding more layers.
Test transitions at the actual section boundary and listen to the beat from a few bars before the change. A transition that sounds impressive in isolation may not serve the whole arrangement.
Keep effects in time
Set delays, risers and fills to the tempo where possible. Check that reverbs and tails do not obscure the first important hit of the next section.
Use automation to control filter movement, volume and stereo width. Keep the transition organised in the project so later revisions remain easy.