You should make a mental note to yourself.你应该自己记在脑子里。I'll make a mental note to reschedule the meeting.我要记得重新安排会议。I must make a mental note of the address of the shop.我必须记住这家商店的地址。I'll make a mental note to see if we can reschedule the meeting.我会留意一下,看能不能重新安排会议时间。