If you have walls open (such as in an unfinished house), implement Cat-6 cables and wire your home with ethernet before it gets logistically difficult to do so. Wired is always faster than Wireless from the same source.
The Tech Guy Blog
If you do most computer work in the browser, get a Chromebook or iPad instead of a new Windows PC. It's not worth plunging into the complicated and frequently clumsy predicaments (such as being unable to update or upgrade) Microsoft creates if you rarely need the desktop features of Windows 10. On iPad or Chromebook, you'll likely save money and probably be more secure in many respects. There's a chance that Microsoft will be moving everything to the Azure cloud in the future anyway.
When you are buying/building a new desktop PC with any kind of stamina, make sure it has an SSD instead of an HDD. Solid-State Drives are a massive improvement in speed and durability from regular hard drives, Best of all, prices of SSDs have fallen drastically, so getting a 1TB drive is plenty and still affordable. Also, don't get a "hybrid" configuration of SDD and traditional, it's more worth it to go all-in on solid-state.
If you are looking to lengthen the range of your WiFi using an external antenna that can aim in a particular spot, check out RadioLabs.com (Leo's favorite source for WiFi antenna solutions). This can solve issues that Mesh Wifi would not, so for large home areas try a product from RadioLabs. Make sure to include the "S" at the end or else you'll end up at a different podcast website!
If you are a Windows user, do not buy a personal computer/laptop with so little storage that it can't easily download the latest Microsoft updates because it can't fit them. Even if they're super cheap and tempting. It makes very little sense when Microsoft is pushing out such massive updates while PCs exist with such small hard drives. Windows 10, version 2004 has system requirements of 32GB or larger!
These days, it is easy to saturate your internal storage with all the photos you take digitally. A safe and convenient way to store your photos is by using the cloud. For Mac users, Apple Photos and iCloud can sync to babysit your pictures.
Open Apple Photos... Import all pics... Turn on iCloud Photos in Preference... Check "Optimize Mac Storage"
If you have a bunch of photos you want to scan, Leo actually recommends getting an easel, tripod, digital camera, and good lighting. Put your picture on the easel, snap a digital photo, rinse and repeat. Modern cameras are so high-resolution that they can take pretty good photos of pictures when angled right. An alternative is to ask a service like ScanCafe, which takes mailed photos and scans them for you. Costco also has a scanning service of their own, where you can bring your pictures to them before they convert them.
If you want to share a video with friends and family members, but not have to worry about file formats and codecs (NTFS, FAT32, etc.) that may be incompatible with their computer/device, upload to Youtube. You don't even have to make Youtube videos public, as there are a couple of options that keep your upload out of public searchability. "Private" allows ONLY the person logged into the account to view the video, most likely you (the uploader). However, "Unlisted" allows the uploader to send a simple link out to acquaintances, who can then watch it on their screens without being logged in.
If you are using Windows 10 and can not see the thumbnails for your photo files (or otherwise), try rebuilding the thumbnail cache. There's a little-known program called the Windows Disk Clean-up Tool that can do the job. Select "This PC" > [Your Drive] > "Properties" and finally check the "thumbnails" option (while unchecking the other options) to rebuild the icons next to your files' names. It may take a while, but just wait it out and you should be good to go. Not everyone names all their files descriptively, so it's really handy to keep thumbnails visible!
You should always back up your photos to the cloud, and many people use Google Photos. However, it is highly recommended to be prepared with a 2nd or 3rd backup in case something happens to your Google account. If you have Amazon Prime, use their unlimited uploading feature to back up your phone's pictures using Amazon's Photos app. As a Prime user, you also get to store full resolution versions of your photos, unlike Google (though limited to 5 gigabytes of video storage).