If so, you probably want to get rid of it. But you may not want it all to go in the garbage and take up space in a landfill. A way you can avoid that, and do good while you're decluttering, is to donate things people and organizations can use.
Charities that offer pick-up at your home make donating easy. You arrange a pick-up time, leave the stuff out, and they take it away. You could even get a tax break for your donation. Some organizations that offer curbside donation pick-up include:
Check with local charities to see if you can arrange a pick-up with them. Websites like DonationTown can help you find nearby organizations that do pick-ups.
Whatever your decluttering project, there's a charity your stuff can help.