Add a file called "admin.py" in the application.
Enable the appropriate admin needed classes in INSTALLED_APPS and MIDDLEWARE_CLASSES in the settings.py.
Add custom admin class in model.py
class SomeTableAdmin(admin.ModelAdmin):
list_display = ('email_field', 'web_field')
search_fields = ('email_field', 'web_field')
list_filter = ('date_field',)
filter_horizontal = ('many_field',)
admin.site.register(SomeTable, SomeTableAdmin)