It's also important to have a good handle on your drones' airspeeds to ensure you account for the closure rate to people or property. For my Mavic Mini, the max speed is 46.8 km/h (29 mph) flying in Sports mode at close to sea level with no wind. The speed breaks down as follows for the different flight modes;
13 meters per second (42.65 feet) in S-Mode (Sports)
8 meters per second (26.24 feet) in P-Mode
4 meters per second (13.12 feet) in C-Mode
One important fact which often differentiates micro-drones from bigger drones is that they don't have obstacle detection and collision avoidance features since they don't have the sensing technology built in to detect and avoid obstacles. It's generally too difficult to fit this into such small drones. So you really can't count on these added safety features which are more and more common on newer small drones.
Proper flight planning is even more important when flying your micro-drone near people or property. Prior to flight, check weather conditions. Check if there are any airspace or location restrictions. Get familiar with the site using satellite imagery on Google Maps, or better yet 3D view in Google Earth, so that you can put together a good plan for your flight and stay away from obstacles or dangers (e.g. ridges where wind effects might be more pronounceD).
Another important consideration is proper maintenance and pre-flight inspections and checklists ahead of your flight near people or property. Ensure the drone is well maintained, safe and airworthy before flight (now would be a good time to replace damaged propellers or components). Use fully charged and known-to-be-good batteries. Don't skip a step in your pre-flight inspections and checklists.
Weather and environmental conditions are also an important element. Do not use your mini drone in severe weather conditions such as gusting winds, snow, rain, and fog. Pay particular attention for changes in visibility (presence of fog, cloud ceiling), precipitation (imminent storms, possible icing), temperature & humidity (density altitude effects), and wind speed and direction (pay attention to sudden changes). Remember that environmental factors such as wind and icing might have a bigger effect on a lighter micro-drones than they do on a small drone or bigger drones.
Wind can result in horizontal shifting, which may present hazards especially when flying near people or property. Gusts can also bring unpredictability to the horizontal shifting, and even if your drone's full suite of stabilization sensors are operating (even micro-drones have fancy sensors to stabilize flight; the Mavic Mini uses both Downward Vision system Sensors + GPS signal for precision hovering) they might not be able to cope with gusts of wind, and you might not be able to control your drone and prevent it from flying towards people or property unintentionally. In fact, the DJI Mavic Mini can only handle a maximum wind speed of 8 meter per second (Scale 4, 28km/h or 15.5kts). Furthermore, as the battery level decreases, especially in low-temperature environment, the wind speed resistance also decreases. The drone may not be able to return to a Home Point when the wind speed is too high. Fly with caution. Also plan to fly into the wind if you can, to come back with the wind as the battery strength decreases. Don't forget to signal to crew and bystanders to stand clear for take-off (ensure no one is downwind from the micro-drone in case of take-off drift).
Also note that the hot temperatures or high altitudes reduce your drone's lift performance for the same amount of available power. Consider that your drone won't be capable of its maximum performance under such ambiant atmospheric conditions.
Make sure to use all of the automation and safety features offered in your control station and flight controller software. Set an appropriate maximum altitude (not too high as explained before), a Return-to-Home (RTH) altitude, and a Home Point away from people, so that in the case of remote control signal loss, the Failsafe RTH can be automatically activated and steer the drone away from people and back to your Home Point
It's also useful to memorize your "Fly Away" or "Loss of VLOS" procedure. For example, on the Mavic Mini, upon realizing of potential fly-away (e.g. wind carries drone away, uncommanded movement) or loss of VLOS, I immediately make the aircraft brake by pressing the Flight Pause/RTH button once. If it's being blown away by strong winds, I switch to S-Mode (Sports) and fly back towards myself while descending to the minimum safe altitude (wind speeds decrease with altitude, and closer to the ground).
Lastly, if you lose your drone from your VLOS, don't panic! Often, your drone is flying just fine, and you just weren't paying attention and lost it from view. This might happen if you fly your drone too far and you're inattentive and it gets lost against a cloudy backdrop (micro-drones are very small, after all). Just keep calm and follow your procedures. If you can't manage to fly it back into VLOS, and the automatic return to home functions don't work and if video is still streaming, use video to land in a safe landing area away from people and property. If video is not streaming, attempt to recover VLOS by moving towards the direction where you last had spotted your drone, and once VLOS is re-established control emergency landing as best you can (steer away from people and property). In my limited experience, the control station does a good job to re-establish command and control pretty quickly as long as you're within range.
In the worse case that you've lost control of your drone and it's headed towards people, warn them! This sounds obvious, but I've actually added this step to my checklists so I don't forget. If it's flying towards restricted airspace like an airport, warn air traffic control (if you prepared and performed adequate flight planning ahead of time, you would have written down their telephone number or looked up the ATC communication frequencies).
These are just the basics. The more you read, the better you'll be prepared. EUROCAE ED-279 and ED-280 are good references.
I've personally developed a very thorough set of operating procedures, limitations, and checklists for my Mavic Mini, so don't hesitate to use it as a starting point. It's quite detailed, and it also has a section on camera settings and awesome cinematographical shots. Check it out: