1- Using multiple web-browsers on the same machine for different purposes (chrome, waterfox, opera, safari, brave, etc.) For example: one for social media purposes, another for banking / crypto, another one for surfing / researching, other for entertainment and so on. Also make sure to configure them properly installing useful add-ons. Like the following:
1.1- Password manager Add-ons like LastPass or KeePass are essential both for storing + generating random combinations of characters, just make sure to setup 2FA as well as never losing access to the associated email.
1.2- Ad-blockers will censor most of the annoying ads including scams / phishing pop-ups. uBlock Origin is the best.
1.3- Disconnect add-on is great for saving time + bandwidth by blocking 3rd party scripts used for social media metrics, advertising, analytics, etc. Also enhances privacy.
1.4- Privacy Badger add-on blocks all those undesirable trackers that let others monitor your activity.
1.5- EtherAddressLookup is a must for crypto enthusiasts, it performs an automated address lookup as well as warns you against blacklisted domains. it prevents you against phishing / loosing money.
1.6- Running proxy scripts on your browsers is highly recommended because hides your real IP from websites by sending fake headers with anonymous IP addresses. it is easy to setup and gives you peace of mind.
1.7- Finally replace your default search engine Google with a more reliable one like Duckduckgo.com. it is private & simplified without Ads fighting to be on top of the results. You will less likely fall into fake sites, with a plus of a more personalized experience. Highly recommended doing this switch.
2- Using a VPN (paid or free) in order to prevent man-in-the-middle attacks, specially if your connection is wifi and you carry a laptop, also to prevent / bypass government censorship. There are a lot of services worth trying, just pick one that doesn't keep user logs + accept crypto as payment. Also keep in mind that the free ones are great but much slower: ultrasurf.us & riseup.net
3- Incorporate the habit of changing your passwords more often, let say 6 months minimum to 1-2 years max.
4- Make backups more often, or make it automated. Be prepared to deal with data-loss and ransomware. Also always keep your sensitive data offline to prevent identity theft.