to spend less money than you earn
dépenser moins d'argent que ce que l'on gagne (depense moins d'argent que ce que lon gagne)
"It's important to live within your means to avoid debt."
"Il est important de vivre selon ses moyens pour éviter les dettes." (Il est important de vivre selon ses moyens pour eviter les dettes.)
to ensure work stays within schedule and scope
to remove distracting thoughts and relax mentally
to train someone thoroughly to improve their skills
to take more responsibility or show initiative when needed
to study something again before an exam
to motivate and encourage yourself to keep going