Probably the best way is to not have the districts in the first place. If a state has five representatives, run a single state-wide election with five winners, using some variant of proportional representation.
Even better: modify the fundamental nature of the House of Representatives such that a representative's voting power is proportional to the share of the vote they got.
Both of those are pretty major reforms, so absent those probably the best thing is to make sure the redistricting process is not controlled by a single party, and maybe imposing some restrictions on how complex the shapes can be.
Even better: modify the fundamental nature of the House of Representatives such that a representative's voting power is proportional to the share of the vote they got.
Both of those are pretty major reforms, so absent those probably the best thing is to make sure the redistricting process is not controlled by a single party, and maybe imposing some restrictions on how complex the shapes can be.