Typically it's not a choice - it's a result of your ballot system.

Ranked ballots, directly for candidates, can easily prevent this. People need to trust that their vote is not squandered if they throw in behind some longshot, or if they like several similar options.

Juuust don't do "Ranked Choice" specifically, for single-winner elections. The multi-winner version, Single Transferable Voting, works as intended. RCV gets stupid results and has suspicious backing. You want a Condorcet system like "Ranked Pairs."

Or... just check as many names as you like, for Approval Voting. That approximates Condorcet results and there's no good reason it isn't the default.