One thing at a time. 不要乱做一气。(一样一样来。)
Easy does it. 不用急,慢慢来。 Do things step by step. 做事要按部就班。
One day at a time. 过一天算一天。 I think you're jumping the gun. 我认为你太急切了。
Slow down your pace. 把你的步调放慢些。 Don't jump to any conclusions. 不要妄下断论。
Don't be impulsive. 不要太冲动。 Relax, you'll get your shot. 放心,会轮到你的。 With people today, everything is rush,rush,rush. 现代的人做事都是急就章。