Maxing out 401k to employer match is pretty often good advice.
Saving 20% can be extremely low depending on the life situation or a good target.
Pay your credit card balance in full every month is pretty much never bad advice - the closest to 100% I would say from it.
Financial advisors aren't necessary at least for much of the time you're working on your savings - maybe at the very end of things.
The last piece of advice is fine and all, but it feels thrown in to make whoever wrote it feel good about themselves (the information claims to be about good financial advice, this is an apples and oranges thing to me). Comparing this to Zikoris's addition of rampant overconsumption is killing the planet comment - that comment makes sense, because it's a reasoning for reducing spending whereas this one seems out of left field. Just my take on it; I'm sure others will feel differently.
Overall, the problem with things like this is that financial information and advice is so specific. Maxing 401k to employer match is often good advice, but in some situations, it may legitimately not be. Saving 20% could be a great stretch goal if you're living on $10/hr or something like that. If you are single making 75k with no outstanding debt other than a small mortgage, it would probably be too little. It's just really hard to make something like this very encompassing.
The biggest thing I would add would be, be deliberate in what you spend money on and make sure it aligns with your priorities. If you do have disposable income, being deliberate about what you're doing as opposed to just letting your lifestyle creep up, spending on things mindlessly, and so on is, to me, one of the best things you can do.