… is your most precious resource. It’s very limited, so you need to choose what you spend it on.
Don’t give away your time so easily. If someone asks for it, consider if it’s truly needed before saying yes. If they’re just going to mooch around or use your time to accomplish their goal without any benefit to you, say no. People like to take your time — if you give it away freely they’ll take and take until you’re mentally and emotionally depleted.
Because if you don’t guard your own time, who will?