"палочки-выручалочки"

sheet anchor (переносн. andrew_egroups); life-line (Ваня.В); lifesaver (When you're stuck in traffic, a mobile phone's an absolute life-saver.

cambridge.org Anglophile); magic wand (Anglophile); magic bullet (Букв. "волшебная пуля". A simple remedy for a difficult or complex problem, especially a cure for a disease. : In recent years, penicillin-based drugs have lost some of their magic bullet status due to the rise of antibiotic-resistant bacteria. History shows that there's no magic bullet for a global financial crisis.

wiktionary.org Alexander Demidov)

Gruzovik

hide-and-seek (children’s game)

fig.

Aladdin's lamp (средство, позволяющее моментально, как по волшебству, решить проблему igisheva)

idiom.

friend in need (Nico_Robin)

inf.

Johnny-on-the-spot (VLZ_58); helper-outer (о человеке DC)

slang

spurr (notilt)

"палочка-выручалочка" о знающем человеке