иметь несколько вариантов решений(have another than one string to your bow have another/more than one string to your bow idiom to have another interest or skill which you can use if your main one cannot be used Х I enjoy my work, but I'd like to have another string to my bow in case I lose my job. CALD Alexander Demidov)
не под силу(только в контексте: Having a definite finish time also means I just work on the essentials and do not take on more than I can manage.4uzhoj)
не единожды(You all have obviously only heard the Thin Lizzy or Metallica versions and not the original folk version. In fact Thin Lizzy used to get booked to play folk clubs because of this song and on more than one occasion had to leave in a hurry because the folkies didn't appreciate their rock music. 4uzhoj)