Make a list: if you're anything like me, you're getting swamped with emails as you read this. Make a list of stores you know you want to shop and write down or keep the deal they are having handy to make your life easier while shopping.
Keep track of your purchases: I'm always a little cautious when shopping online - especially on a big shopping day like today. Make a folder in your email and/or print an order confirmation for everything you purchase so that you aren't purchasing duplicates of anything (yep, happens to me more often than I'd like to admit...) and can make sure that everything you order arrives.
Pay close attention to transactions: while it's always a risk, its SO important to make sure that you are shopping safely on Cyber Monday. This is the biggest day of the year for hackers to try and and steal your information. Always make sure that the websites you are shopping on are legit and not sketchy in the least. If you have to question whether the website is safe, your best bet is to move on! Always use secure passwords; never click on links in store emails unless you're sure its from the actual store and try avoiding using a debit card online.
Make social media your best friend: even though most websites advertise their sales on the main page of the website, sometimes you can find extra discounts or deals straight from the company's social media accounts. I mean, doing everything you can to assure you're getting the best deal is the goal of Cyber Monday!
Go for the more expensive items: it's well known that all products are available for sale on the biggest online shopping day of the year, but Cyber Monday is especially great for more expensive things - even better than Black Friday! This year, expect to be able to buy TV's and similar electronics for a fraction of their original prices.