The proper temperature controlled solder station with the correct interchangeable soldering iron tips, patience, and practice.
Learn how to keep your tools clean and serviceable, and not just throw them in a tool box.

When working with semiconductors and electronic components, proper preparation and cleaning of the board is essential.
This ensures that electrical contact of circuits is precise, and you do not overheat the board.
Always ensure you are electrically grounded when doing repairs of electronic components, there are NO exceptions to this rule.
Soldering coils and wires is not soldering PCBs.
Soldering through hole component mounted PCBs is not SMD work.
Knowing the difference is important, and the tools are different.

Reading any guide is only a first baby step, and part of the reason why so many novices makes errors.
The birth of the internet was not always a boon for IPC standards.
Take a local soldering class at the trade workshop or community college.
You will improve your skills dramatically, with less trial and error, and reduce chances of ruining hard to find boards.
Many older early SS PCBs are salvageable, even 40 years later, if not hacked.