Definition of segulah ranges from folk remedy to supernatural cure.
Best Time Tested Segulos
Segulah for recovery from illness: Go to a doctor (Berachot 60a, Bava Kamma 46b)
Segulah for longevity: Lead a healthy lifestyle (Rambam, Deos 4:20)
Segulah for marriage: Look for a suitable wife (Kiddushin 2b)
Segulah for shalom bayis: Love and forbearance (Sanhedrin 7a, Bava Metzia 59a)
Segulah for Kavanna in prayer: Take it seriously (Berachot 5:1)
Segulah to prevent drowning: Learn how to swim (Kiddushin 30a)
Segulah for honest Paranasa: Learn a profession (ibid)
Segulah for pure faith: Don’t believe in segulot (Devarim 18:13)
It’s nice to see practical Judaism once in a while.