4. Get unlimited food & drinks
Heathrow is the best example of why flight status matters. The Virgin Atlantic Clubhouse in Terminal 3 is probably the best lounge in the world with restaurants, lounges, bar, a Bumble and bumble salon, a Cowshed spa, a pool, music studio, screening room, library, work center, arcade, and more. The catch is that you have to be upper class, have mega-status, or buy a day pass for a whopping £240.
If your wallet just had a panic attack, never fear. Also in Terminal 3 is the No. 1 Traveller Lounge, with access running from an easy £24 for three hours. Granted it might not be as OTT as the VA Clubhouse, but with almost all of the same perks (Wi-Fi, spa, food, workspace, cinema, etc.), you can still have all the perks like free food and booze. If you’re in the recently reopened T2, there's the Plaza Premium Lounge, which gives you showers, spa, a tapas bar, Champagne lounge, resting suites, etc., for around £40 for two hours.
5. Don’t pay for Wi-Fi
Heathrow respects that you have to update your FB status and make everyone mad jelly about your trip, thus it provides four hours of free access. Stuck there for longer? Sign up for Heathrow Rewards (cost: 30 seconds of your time) and you can score an additional four hours.