Keep the battery cool - Avoid heat and use the battery as little as possible. If you're going to be running on AC power for a while, shut down or hibernate the computer, remove the battery, and work without it.
Be careful about eating and drinking - Spill coffee on your laptop keyboard, and you could short out the motherboard.
Find the right carrying case - Before taking it on the road, pack the laptop properly. Depending on your carrying preferences, look for a carrying case, backpack, or shoulder bag with a padded section designed especially for a laptop.
Clean the keyboard properly - When keys starts sticking, it's time for a cleaning. Shut down the PC. Keep it open as you turn it upside-down and very gently tap on the back so that crumbs fall out. You can use a can of compressed air to blow out whatever is still stuck. Be sure to read the instructions on the can, first. Then turn the PC upside-down and tap it gently again to get the last bits out.
Clean the screen when it needs it - Start with a dry, microfiber cloth--the sort you get at an optometrist's, move it in circular motions. Be gentle, but apply slight pressure on particularly stubborn spots. If that doesn't clean the screen, make your own cleaning solution by mixing distilled water and white vinegar in equal proportions into a spray bottle. Turn off your laptop. Spray this mixture lightly onto the microfiber cloth, not onto the monitor. Wipe as described above, and then wait ten minutes before booting up.
Be safe - Anytime you are required to open the printer for maintenance, turn off the power and keep your hands clear of hot fusers and moving parts inside the printer. This will prevent unnecessary damage to the printer and to you.
Remove Dust and Debris - Build-up of dust, toner and other debris inside your printer can cause jams as well as streaks of ink that appear on papers where you don’t want them. A quick fix is to remove particles using a small vacuum. This is preferred over using canned air dusters because it removes the dust instead of spraying it around the inside of the printer. You can go further by using a cotton swab and purified water to clean the ink cartridges; most manufacturers will provide specific instructions in the printer manual or online.
Carefully Resolve Mechanical Errors - When a paper jam does occur and do not resort in yanking the paper out, refer to the instructions that come with the printer to find the best way to fix a jam on your specific model. Usually, the best practice is to use both hands to slowly pull the jammed paper out of the printer to avoid leaving ripped paper behind or damaging the internal parts of the printer. You can also prevent jams by making sure the paper you load into the printer is not torn, dog-eared or stuck together and that the tray is not overfilled.
Use a stylus - a stylus protects your screen from greasy fingers, dirty hands and fingernail scratches. These issues can deteriorate your screen and over time hinder usability.
Don’t drain your battery - Contrary to what you might have been told, it actually damages your tablet to let the battery drop below 20%. The myth that you need to teach your battery its lifespan is not relevant for your tablet – in fact, it is just the opposite. Frequently charging your battery is better.
Be Careful of Public Networks - You can walk into a mall, coffee shop, sports arena, and many other places and find your tablet connecting to a free public wifi network – you’re probably doing a little fist pump when this happens. Although it’s fantastic, keep in mind that these are public networks, meaning that they are not as secure as your home or office connections.
Keep out of the Heat - This might seem like a no-brainer, but it’s probably one of the most important tips: Don’t leave your tablet out in the sun for extended periods of time. Of course, it’s all right to bring your tablet outside while eating lunch; just make sure you aren’t in direct sunlight for too long. Batteries can overheat very quickly and it isn’t healthy for your tablet to be going through such rapid temperature changes; they are not built for extreme conditions. When you feel your tablet getting too warm in your hands or in your lap, place it in a position with better ventilation.
Source: Caring for your laptop
Source: 5 Tips to Maintain Your Printer
Source: 4 Tips for Taking Better Care of of Your Tablet