Long story short: tell your Congressfolk not to impose a no-fly zone over Ukraine, pass the Homes for All Act, outlaw geo-fence warrants, pass the Open App Markets Act and the Domestic Workers Bill of Rights Act, and end our involvement in the war on Yemen. Use the tools in the upper right-hand corner of this page (or, if you're on a cellphone, the bottom of this page) to find your Congressfolk's phone numbers and/or use the email/petition tools in the following paragraphs.
Roots Action helps you tell your Congressfolk not to impose a no-fly zone over Ukraine. Nobody wants to see good Ukrainians suffer at the hands of Vlad the Bad, but nobody wants the U.S. embroiled in a war with Russia, either, since basically everyone will lose that one. Folks don't always understand what a "no-fly zone" really is, either: it's not some magic invisible dome that covers Ukraine, but U.S. planes flying over Ukraine and shooting down Russian planes, which, again, leads to war with Russia, and, again, very likely to Earth's destruction. And polls find majority American support for no-fly zones -- until pollsters explain exactly what that means, and then polls don't find majority support anymore. Yes, it's frustrating when bad people get their way. But a no-fly zone won't constrain Vlad the Bad.
Renters Rising helps you tell your Congressfolk to pass H.R. 7191, the Homes for All Act. This bill would help build new public and private affordable housing, and it would help combat gentrification and promote alternative home ownership models, i.e., to "landlord owns and charges you through the nose." Prices for so many essentials -- health care of course, student loans because they tell you you're worthless if you don't go to college, child care and rent because what else are you gonna do? -- have been going up for much longer than our recent battle with inflation would indicate. And they do it because they can! People don't just up and move whenever they like, certainly not if no apartments will do any better by them. If the "free" market doesn't provide, our government has to step in. That's not "socialism," it's common sense.
Defending Rights and Dissent helps you tell your Congressfolk to pass legislation outlawing geo-fence warrants. A geo-fence warrant lets law enforcement ask big tech corporations what devices were in a specific area at a specific time, which may sound like a smart way to catch bad guys, but which actually violates our Fourth Amendment protections against unreasonable search and seizure, as a U.S. District Court Judge has lately ruled. Law enforcement would comply with our Constitution if they got a warrant to find out whether a particular individual's devices were in a specific area at a specific time, but why do all that work when you can go on fishing expeditions? If it's wrong, and if law enforcement won't stop doing it, Congress has to step in and stop them, on our behalf. That's not "big government," it's common sense.
Free the iPhone helps you tell your Congressfolk to pass H.R. 5017/S. 2710, the Open App Markets Act. You're thinking that if app makers want to sell their wares on an app store owned by Apple/Android/Google/Microsoft, they have to do whatever the app store owner wants? That's only true as far as making their apps compatible with particular operating systems (if they app maker fails to do that, it'll become apparent to the user right away!). But app stores typically do a lot worse. The Open App Markets Act would prevent corporations like Apple, Microsoft, and Android from forcing app makers to use proprietary in-app payment systems, forcing them to charge the same price in every app store, or punishing app makers who do either of the above. If corporations want "free" markets -- which they all say they do -- then they have to stop choking off competition.
The National Domestic Workers Alliance helps you tell your Congressfolk to pass H.R. 4826/S. 2569, the Domestic Workers Bill of Rights Act. Our laws extend many protections to working folks, but for some reason our laws often exclude domestic workers from these protections (and by "for some reason" I mean "because they're poor and/or foreign"). The Domestic Workers Bill of Rights would not only extend minimum wage and maximum hour requirements for domestic live-in workers, it would ensure that those workers get certain other protections (for privacy, paid leave, sane work scheduling, and against discrimination) that, really, all workers should have, but which live-in workers feel particularly acutely. If you live where you work, your boss can abuse you plenty and easily, and nobody should have to put up with that.
Finally, Daily Kos helps you tell your Congressfolk to pass a War Powers resolution ending our involvement in the Saudi/UAE-led war on Yemen. Because starving two million children to death is wrong, because fighting undeclared and therefore unconstitutional wars is wrong, and because helping the coalition kill some of the world's best fighters against al-Qaeda is wrong, and ain't it funny how often that last item happens? Ask the Kurds how well we stood by them after they proved their mettle against al-Qaeda! President Biden did promise he'd get us out of this mess, but most of his moves over the last year haven't gotten us out, but more like further in. That means Congress needs to step in -- which, per our Constitution, they should have done in the first place!