Shark Tank star investor Lori Greiner is frugal. She didn’t splurge on a single luxury item until she was in business for four years. Here are four wise ways Greiner saved money (and sanity) when she first started out and how she says you can, too:

1. Forget the swanky office suite. Work from home instead. “Avoid spending money unless you absolutely have to,” Greiner, who worked from home for five years following the launch her first smash-hit jewelry organizer, writes in her book. “Try to work out of your home for as long as you can, even if you have a few employees, to keep overhead low.”

When she’s not busy filming marathon 12-hour days on the set of Shark Tank or selling innovative wares on QVC’s Clever & Unique Creations, Greiner still works from home today. “I roll out of bed in the morning, whenever I want, and I work right away because, to me, that’s the life. That’s freedom. The whole point for me is that I love the freedom of being an entrepreneur, that I do what I want to do when I want to do it.”

2. Don’t go on a hiring spree. Stay small and don’t bring anyone on staff until you absolutely need to. Greiner says she sees fledgling entrepreneurs “trying to impress people from the outset by hiring all over the place.” They often showboat and blow money they don’t even have yet on employees they don’t need. Instead, she suggests rolling your sleeves up and doing what you can yourself, without hiring anyone.

“You answer your own phone or get an automated system,” she says. “You can keep track of your own books.” (After five years in business, she hired her accountant husband to handle her finances.) “You have to be willing to do as much as possible by yourself up until you simply have no choice but to hire someone; and even then, you will have to stay intimately involved in the day-to-day operations, because even the best employee will never be as vigilant as you will.”

Eventually, and only when you have the means, she advises you hire in baby steps. You might consider contracting with a freelancer — someone who works out of his or her own space, not yours — to take on a few marketing or graphic design tasks. “Hire prudently, go slow and don’t go overboard.” Or you could go broke.

3. Don’t stock up on too much inventory. This is one of the worst and most common mistakes Greiner sees first-time entrepreneurs make. “Never manufacture a product before you even get your first order,” she stresses. “First, you’ve put yourself on the hook to pay for all those units, even though you have no guarantee of revenue. Second, you now have the additional burden of paying for storage. Third, when you order your inventory too soon, you’re wasting the money you paid for your prototype because you’re undermining one of the main reasons you got it in the first place — to conduct your market research.”

Blindly guessing how much inventory you might or might not need is a recipe for disaster. Instead, Greiner says you should carefully size up your market, your competitors and the demand for your product. Doing so should give you a decent idea of how much inventory you should order out of the gate.

4. Don’t borrow money from your family. That is, unless Mom and Dad and Grandpa Joe are completely okay with never getting paid back. “It’s a gamble. It’s like walking into a casino. You never know if it’s going to work out or if it’s going to end your relationship.”

No matter how clear your boundaries, borrowing cash from your loved ones to get your business off the ground can go south fast and irreversibly sour relationships forever. It’s best to avoid this common mistake altogether, even if you think you can handle it.

Greiner, who did not take out a loan from her family to start her business but admits she had a plan in place to financially lean on them, if needed, recommends several other, less potentially messy routes for raising capital.