Adiyen Namaskaram
To overcome bad habits antha karana sudhi has to take place for that nithya anushtam will help
Another way to get ride acharyen uchitam

Naama Japam

Real Sat Sangam

To be away from all sources that will remind of old vasanas, even if they happen to be study of puranas, itihasas etc.

To study pure Spiritual Books – Upanishads & Bhagavad Geeta

To be alone as far as possible, with holy thoughts (alone means avoid communication by all means).

To stop watching youtube and media text / audio / videos, newspapers (we are not anna pakshi to take only that is good for us.)

If you want to have spiritual knowledge / religious knowledge, purchase books, read and study alone in your home / a comfortable place.  Do not try to get these stuff from electronic gadgets (including the present one where I am typing, if possible.)

Consistent and constant prayer to the Lord to help us in removing the old vasans.  In fact, our holy books declare that our vasanas will be eradicated only at the time of realization of self OR darshan of the Lord.

During modern days, nobody is fit to be Acharya or Sishya (it is my opinion).

Avoid going to rich and crowded temples; but select a nearby simple temple and meditate in front of that Archavatara without any disturbance.  Don’t go to temples during auspicious days like vaikunta ekadasi, panguni uththiram, etc.; instead select a normal crowdless day.

Do not go into inner circles of any Math, religions institutions, spiritual organizations as they are poisoned with money, power, local politics.  Keep an ideal distance from these places so that you are benefited and at the same are not spoiled.

As the above swamin mentioned, (if not already done) start practicing nithyanushtana where you will always recite lord’s names.

All the above things, I am not just preaching; Either I am practicing OR making sincere attempt to practice.