My configuration and recommendation for JetBrains IDEs.

• .ignore: adds support for various .ignore files.
• CodeGlance Pro: displays a zoomed out overview or minimap similar to the one found in Sublime into the editor pane.
• JPA Buddy: helps developers work efficiently with Hibernate, EclipseLink, Spring Data JPA, Flyway, Liquibase, Lombok, MapStruct, and other related technologies in both Java and Kotlin.
• Maven Dependency Checker: checks if there are any new Maven project dependencies available.
• PIT Mutation Testing: adds a 'Run configuration' that allows to execute PIT within IDE.
• SonarLint: finds and fixes coding issues in real-time, flagging issues as you code, just like a spell-checker.

• Enable actions on file save in Settings → Tools → Actions on Save. Reformat code, Optimize imports, Run code cleanup are nice tasks to enable. The setting is per project.
• Configure the copyright template of the project in Settings → Editor → Copyright. You can also update the copyright on file save.
• Add custom TODO patterns in Settings → Editor → TODO to match what is used in your projects.

• Enable sync in Settings → Settings Sync to have a backup or synchronize between computers.
• Configure the live templates in Settings → Editor → Live Templates. See the dedicated page for my live templates.
• Configure the code inspections to your preferences in Settings → Editor → Inspection. You can also create simple inspections.
• Configure the default code/file generation of things you do often in Settings → Editor → File and Code Templates. Includes/File Header for the new file Javadoc, Code/Catch Statement Body|Declaration, etc. Other settings are available in Settings → Editor → Code Style → Java → Code Generation.
• Configure the template for getter/setter/equals/hashcode generation. You need to be in a Java class with members, then Right click → Generate… → (Getter|Setter|Getter and Setter|equals() and hashCode()|toString()) → Button […] next to the Template dropdown. See my templates.