Personally, as someone who certainly tips in restaurants and some other situations but doesn&#x27;t go overboard--even though I travel a lot, I&#x27;m never sure what to do in so many of these gray areas given that I don&#x27;t want to universally just my wallet.<p>For example, I take a limo service that&#x27;s pretty cut and dried. Pick me up, drop me off. There&#x27;s a tip field when I sign the receipt. I don&#x27;t add anything and I&#x27;ve never gotten a dirty look or a suggestion that I might have &quot;missed something.&quot; I <i>assume</i> I&#x27;m not being horribly cheap.