1. Checking email once in the morning and once in the evening The weekends are supposed to be family time and for relaxing. If you're spending hours replying to emails, then you're not really taking much time off. Consider checking your email tomorrow only twice.
2. Go online only for non-work related stuff An easy way of doing this is to simply change browsers. As an example, I use Firefox for my work related browsing during the week. Once I want to log off, I use Chrome.
3. Turn your cellphone off Constantly glancing and checking your smart phone is starting to get tedious, especially when you notice the habit in others, which will probably make you reflect on your on technology use. Turn off your cellphone for the weekend and see what happens. Most people will still be able to reach you via a landline, email, IM, Facebook, and other ways of communication.
4. Do as little social networking as possible Checking up what the Joneses are doing on Facebook can get annoying. Facebook sucks time out of your working day, and it will do the same on your day off. Logging off is the best idea to take some time off.
5. Unplugging your landline Depending on what your job and family situation is, and the way that you usually communicate with others, unplugging your landline will probably only affect a portion of the people in your life. It will stop telemarketers from waking you up on Saturday or Sunday while you're trying to take a nap or sleep in.