Make the most of your layover in Iceland by booking one of Icelandair's tours, including a transfer to the Blue Lagoon between flights. See Dubai without having to pay for a visa with Emirates' stopover offer, which includes a free visa for a one-night stay. Get to the Eiffel Tower, even if you only have seven hours at Paris' Charles de Gaulle Airport, by booking the Paris Transit Tour from Aeroports de Paris.
You don’t even have to stick to the airlines’ schedules. Many companies provide private jet memberships, for example, the Private Jet Membership program from Paramount Business Jets allows members to fly at the lowest possible price and enjoy extra flexibility as they can fly in as little as an hour after booking. The membership program lets you have access to the best jets without having to buy them.
If you're traveling to a "regular" city and you're not taking clients out, a great way to save money is to get a gift card to a chain restaurant(s) you like. You save time, as you know the menu in advance and you potentially save money/hassles over unknown local options/hotel offerings. Of course, make sure that the chain exists where you're staying and this advice is for "regular" meals only - not trying local cuisine. This way, you can focus on business with one less distraction.