Not much different than if I was making $35k or $140k. Tax strategy might vary a bit, but otherwise just control one's expenses.
Exactly this. Think about what really creates solid, lasting happiness for you and spend your resources there. Anything above that is extra that you can save, no matter what your income level is. Max out your tax-advantage space and invest in simple, diversified investments that don't charge high fees. Don't mess with fancy securities if you don't understand them. Make this a routine and all you have to do is keep calm and don't fuck it up.
Since you've revised the question
In my personal case: I'm a bit shy of 70K, but I make a conservative budget to save 50% of my salary through tax-advantaged accounts alone. I make point-of-sale decisions on whether I need/want something enough, and usually come in way under budget and end up saving more than that. Everything gets invested except about 10K I keep in cash as an emergency fund (As a single guy, my job is all the cash inflow I have, and I'd be up shit creek if something were to happen and I suddenly lost that income stream without the cash on hand. YMMV).