Build an emergency fund and hang on to it for everyone.

Let them ask you, otherwise you're kinda enmeshing yourself in their daily affairs when you aren't party to it. They have to learn how to operate without your input day to day and you have to learn how to operate independantly managing your own affairs and state

They'll do Them.

You do You

Maybe offer to shout them a nice dinner once a month. I know it involves money but it's more of a gift than paying their bills.

What about subscription services, food delivery boxes, Spotify, Netflix, anything you can pay for on their behalf to enhance their lives? Can always start out saying you got a two for one deal for 6 months so they don't refuse outright and you can just keep on doing it.

Are your parents poor? Then just buy them stuff they need, like new clothes etc. There is always an opportunity for gift giving. Are they doing OK financially? Then just buy them something nice occasionally. Save the money you'd want to give them for a rainy day fund. If shit hits the fan, be there to support them.

Besides money, a great way to support your parents is to stay in touch. It took me way too long to realize that I can call my mom just to say hello and have a quick chat.

Now I try to call and check in as much as possible. During most of those calls are when I find out if there is anything else that they need. Without those conversations, though it would never come up, since they don't want to bother me.

Save money for a rainy day or to get a house if you don't have one. Not being a burden in future is the best thing you could do.

If they're still working, they don't need your support. Focus on staying in touch with them, and let them know that if they do need you, you're here.

Like someone else said, instead putting money into savings, so that a future need can come out of that instead of your current funds, that'll mitigate the future need.

It sounds like maybe they’re doing fine without your help. Maybe you could put money into a savings account and then keep it available in case they want your help.

Parents like to be around their kids. Not a rule but most do. So visit them. This is something no one else in the would can do, and money can't buy.

One way to send money without really sending "money" is to give them gift cards for the local grocery store. Everyone needs groceries and it often has more of a free gift feel than a charity case feel to it. You could even pass it off as if it's something you won or received and you're just passing it along.

Show them that you love them other ways. Schedule weekly calls with them, but otherwise respect their decision not to recieve financial support from you

Do they actually need the help? Personally I'd just leave them be and be available if they need support for whatever reason

Besides all the other stuff mentioned, you can invite them to stuff occasionally and prepay everything. Make it a family event if you want to.

If you have children, support them. If your parents ever need help, they will tell you.