I am always looking for new ways to spruce up my home and spend most of my time watching home makeover shows for inspiration. From remodeling shows and property flipping shows to dreamy makeovers on a budget, I can happily watch them all. Besides, who doesn't like the "big reveal" at the end of the show, the spectacular makeover?

But while my obsession with home makeover shows has given me plenty of visual ideas for my own home, there are three mistakes that people invariably make. While the experts on the shows successfully advise homeowners on what to do, these mistakes often trip them up. Moreover, these interior design mistakes can be expensive, especially if you are working on a tight budget.

So, if you want to avoid major pitfalls when upgrading your home, here are three mistakes people always make (as seen on home makeover shows).

Also, do any of the 7 things that make your home look outdated apply? Also, if you plan to paint a room like a pro, you may want to avoid these paint colors that make your home look cheap.

There is nothing worse than furniture that doesn't match, but one of the most common mistakes is when homeowners forget to measure the space correctly. Getting the size of the room wrong can make the space seem smaller or larger, so it is always important to check the size of the furniture before purchasing it.

Commonly mis-measured items include sofas, coffee tables, rugs, and artwork. If space is tight, experts recommend looking for sofas and chairs with narrow arms, high legs, and a view of the floor below. The more floor you can see, the larger the room feels, which is essential when trying to make a small room seem larger.

Ideally, the rug should also be larger than the sofa, placed behind the sofa's front legs and overhanging at least 12 inches from each side. Similarly, experts point out that if you want to buy the perfect coffee table, it should be 2 inches shorter than the sofa's seat and two-thirds the length of the sofa. That way, you can walk comfortably around the table without bumping your feet or feeling too far away.

Also, if you don't have natural light in your room, read "How to Brighten a Dark Room."

How many times have I seen homeowners spend a fortune on paint? This is mainly because they did not test the wall tint before deciding to paint the entire room.

In general, paint colors look different on walls than on the swatch cards you see in stores. Additionally, certain shades may vary from room to room depending on the lighting. That's why it's important to buy a tester first before spending money on the can of paint you choose.

Experts recommend selecting samples of three shades of the chosen color so that subtle undertones can be seen. It will make a big difference in the final result and give you a better idea of the overall look and feel of the room. Depending on the brand and type, paint testers cost about $5 to $10 each. However, this is still a small price to pay to find the perfect shade for your walls without having to redo the job.

You can also refer to seven nifty paint hacks that you'll wish you had known about earlier, and paint without hassle. There are even ways to paint a ceiling without staining it.

Another mistake homeowners make is buying things on impulse without considering their personal style and budget. According to interior designers, having an "Instagram-worthy" home is great, but spending money on new furniture just for the sake of it makes the home look cheap.

By definition, design trends come and go. So while it may be "trendy" to fill your home with the latest decor, many drab styles begin to look dated or tacky. Instead, stick to simple, neutral styles, tones, and accessories that will remain timeless over the years.

More importantly, when redecorating, stick to your budget and choose sizes, numbers, and combinations that fit the style of your home. Remember, quality over quantity.

If you are removing walls, you need to know how to remove wallpaper before you paint. Accidents. Learn how to remove paint from carpet. Also, if you want to take care of your walls, we will show you how to clean the painted walls to remove stains. Plus, if you're selling your home, these nine essential interior design tips could help you sell your home.