I've learned a lot from reading One Mile at a Time (Ben/Lucky), View from the Wing (Gary Leff), The Points Guy, etc. And of course, from reading FlyerTalk.

Most people won't be able to fly every flight in first class from reading the advice on blogs and signing up for credit card bonuses... but for a typical middle class person they can easily accumulate enough mileage to take some nice vacations and fly in business class or first class instead of economy and maybe book some nicer hotels/resorts.

For example, many would not pay up $4,000 for a 1-way flight from the USA to Australia in Business Class. 80,000 Delta Miles, though, could be accumulated from signing up for an AmEx credit card and then putting your normal expenses on it and maybe doing some manufactured spend.

I will chime in here that one of the problems in America is too many "helicopter" parents who don't let their kids explore, learn on their own, and take risks. These people end up being in their 20s, unable to succeed in business because they can't make decisions on their own and produce results.