Don’t squander your lunch break because it’s ‘free time.’
Take a real break. Breaking from work for 60 seconds to chow down your lunch at your desk doesn’t count.
Time to disconnect from your work provides renewed energy, and, as a result, makes the rest of the day go more smoothly. The afternoon can bring some lulls that can be offset by having been away from your desk. Talking with people about something besides work during lunchtime can also boost your energy level and improve your mood.
Time is a non-renewable resource, wherever you are, whatever the time of day. Try your best to plan it out and make the most of it.