Don’t bother trying to replace “bad” emotions with “good’ ones – you will find it a continual struggle, and not really worth the uphill battle. Trying to corral your bad emotions doesn’t work either – they can consume you if you try.
Instead, work to purge yourself of emotions that are of no use to you. A good start is to say to yourself: “Y’know, at the end of the day……”, and then see what really matters in terms of getting the results you’re looking for.
This is a simple but effective way to make your emotions work for you rather than against you.