A side hustle may just sound like extra work. Like coming home from your 9-to-5 job only to work another one (goodbye, free time). But a side hustle that generates income beyond your primary job doesn’t have to be a drain on your energy or time.

It’s easier than ever to find ways to make money on the side of your day job. As the side hustlers below show, it can be as easy as digging out forgotten treasures from the back of your closet.

Whether you’re looking to leverage a side gig to more quickly build wealth, or you’ve set out to increase your emergency fund or save for a specific financial goal, consider these four side hustles you can start today:

1. Sell unwanted items online

If you’re considering ways to make money side hustling, look no further than your own home. Chances are you have items lying around that you don’t actually use—books, toys, kitchen gadgets, exercise equipment, tech accessories, you name it—that sounded like a good idea at one point but are now just collecting dust. Selling unwanted items online is one of the easiest side hustles you can do while working full time.

“If it’s still in decent shape, there’s a buyer out there for items you’re no longer using,” says Tom Drake, founder of a personal finance blog and no stranger to selling items online in his spare time.

Drake and his wife declutter their home and sell unwanted items online as often as they can. A recent focus was video games: Drake says he sold about $2,000 worth of video games that were sitting in his garage for over a decade. Based on his calculations, he expects to sell about $10,000 worth of unwanted items in 2018.

If you’re thinking about posting items online as a way to make money on the side, Drake says it’s easy to start. Listing items doesn’t take long, though he suggests taking a decent photo and writing a detailed description to make the item easier to find in search results and more likely to sell in a timely fashion.

If you try your hand at selling items online as a side hustle you can do while working full time, Drake suggests meeting buyers in public places or near your work so they don’t have your home address. “I can quickly run outside at my office, and offering this option might also give the buyer a more convenient time and location,” he says.

While Drake always looks for new ways to make money side hustling, he remains partial to his online sales because he finds the process so easy.

2. Flip items online

Product flipping as a way to make money on the side involves buying items cheaply, then reselling, or flipping, them at a higher price. Drake started this side hustle you can do while working full time after he cleared out most of the clutter in his home.

“Once you’ve cleared everything of yours out and are comfortable with the process, you can also up your game by finding items on these sites at a great deal,” Drake says. “Then you can clean them up if needed, create a better ad with pictures and resell them at a higher price.”

If you’re interested in a side hustle you can start today, you can flip anything from textbooks to sneakers, as long as you know the value of what it is you are selling. With a little online research, you may find the items you plan to sell have more value than you initially realized. For example, in addition to selling his own video games as a way to make money side hustling, Drake also found video games online, at garage sales, and at thrift stores that he would sell for a profit. He checked the value of each video game online.

Outside of video games, Drake says you can find clothing at thrift stores, then list it for 30 to 50 percent off retail price to make a sale. For collectible items like coins, you can search the item online and add the term “price guide” to the search query. This type of information could come in handy as you build out your pricing structure. Don’t forget to explore e-commerce sites to gauge market rates for items.

3. Start an online store

Briana Ford is a search engine marketing campaign manager for a marketing company based in Dallas. Her way to make money side hustling is through three stores she runs on Shopify, an online e-commerce platform. She generates about $1,000 to $3,000 in total revenue each month.

Her stores sell phone covers and graphic tees, respectively. Her most popular store sells ’90s memorabilia. She creates the designs through an online printing service and uploads the photos to her store. When someone buys, say, a cell phone case, the service prints the design on a case and sends it off to the customer. She took a weekend each to start her stores.

“We live in a day and age where you can literally have an idea in the morning and have your business launched in the evening. There is an audience and a customer for almost anything,” she says.

She also helps fellow African Americans start their own stores as a consultant via Startup Noire.

4. Launch a blog

Eric Rosenberg, founder of a personal finance blog, has tried side hustles from web coding to organizing flash mobs. He found a winning side hustle you can do while working full time with his blog.

He has tracked his online earnings publicly since 2012, when the blog earned him about $700 a month. By 2017 he had a six-figure business. Most of his income comes from writing services and website support, with some affiliate income, Rosenberg says.

Blogging is one of the side hustles you can start today, and it doesn’t necessarily cost much to get up and running. However, as the online income reports on Rosenberg’s blog show, it does require patience to make it really pay off.

Ways to make money side hustling: The possibilities are endless

These are just a few of the possibilities available to you as you explore ways to make money on the side of your primary career. As you compare the various side hustles you can start today, consider activities, skills, or experiences that you’re passionate about. Enjoying and finding value in your side hustle may make the extra income and increased earning potential even more rewarding.

Articles may contain information from third parties. The inclusion of such information does not imply an affiliation with the bank or bank sponsorship, endorsement, or verification regarding the third party or information.