Use cash while we still have it. Draw money before you leave on your travels. Every card transaction leaves a digital trail.
Linux gives you the most freedom. Unlike MS and Apple it allows you to operate without an account.
Smart Meters monitor you, do this yourself for more privacy.
Your data can be de-anonymised more easily than you think.
Delete your Wi-Fi history as this data can allow others to get an idea of where you have been and when.
Get used to the idea. It is perfectly fine and will help you a great deal.