If you have a ladder you carry around from project to project, it often takes a couple of tries to find the right spot to grab it so it balances in a horizontal position. To solve this trial-and-error handling, do this: Grab one side and adjust your hand until the ladder balances. Then put a dab of bright paint or tape on that spot. Then you will always know exactly where to grab the ladder to move it.
When buying quantities of standard fasteners, such as screws or bolts, buy a full box anytime you will need close to a half box or more. The second half of the box will be virtually free. For example, 45 individual screws will usually cost about the same as a box of 100 screws.