Trust what I am saying; believe me.
私が言っていることを信じてください; 私を信じてください。 (watashi ga itte iru koto o shinjite kudasai; watashi o shinjite kudasai.)
"Take my word for it, this method really works."
"私の言葉を信じてください、この方法は本当にうまくいきます。" (watashi no kotoba o shinjite kudasai, kono hōhō wa hontōni umaku ikimasu.)
a big and sudden improvement
to feel very happy and excited
to move gently onto something
to do your share of the work or responsibility
to have no time or energy left; to be overwhelmed
a well-established and financially sound company