Quick poll: How many recovery options do you have enabled?
Account recovery is something you hope you will never have to use, but if for some reason you are unable to correctly enter you Master Password one day you will need it. The good news is there is more than one recovery method, but you have to set them up now while you are able to sign in successfully.
The most commonly used recovery option is through the browser extensions, but this should be seen as the last option and not the main one you rely on. This method is dependent on a special recovery one-time password that is generated when you sign-in to the extension successfully and stored in your web browser. However, if for any reason you clear your browser cache it will be deleted until you sign-in successfully again.
Pro Tip: If you have more than one web browser on your computer, install the LastPass extension on all of them and sign-in to them multiple times, that way if your main browser loses it's recovery one-time password you have a back up option with the other browser you do not normally use.
This support article explains how to set up all of the available recovery options, if you have not gotten around to setting any up yet why not take some time now? How do I set up all account recovery options for LastPass?
Remember, LastPass Customer Care has no knowledge of a user's Master Password. It is not possible for LastPass Customer Care to reset or change a user's Master Password if it is forgotten.
Yes, if you clear your browser's cache often this can delete the recovery one-time password saved for that browser and thus you wouldn't be able to recover your master password in that browser if you were to ever need to reset it. We would recommend installing a second browser that you do not plan to use or clear the cache for often and logging in to the LastPass extension in that second browser a few times so that you can generate a recovery one-time password in that browser and have that available in case you ever need to reset your master password in the future.