Should rationalists put much thought into tipping and/​or voting?

It seems to me that tipping involves rather little money, and voting involves rather little time. For the latter, I’m assuming that you follow politics enough anyway that you have at least one candidate you prefer.

I’m willing to bet that there are people who spend more time in a year on whether voting is rational than they would if they just went and voted and ignored the arguments.

What are the biggest wins you’ve gotten in terms of time and/​or money from thinking about what you’re doing?