Personally when heading out on a solo ride, I always take my mobile phone in a protective case. I almost always put it on airplane mode when riding, but I also make sure someone knows my general planned route. Then, the phone becomes more of backup a safety device and maybe camera. I also typically keep a $5 bill in my pack just in case. I also carry a piece of Identification with me. You can never be too safe. It goes without saying that when riding, you should always wear a helmet. When on solo rides, we recommend focusing on flow and technique over speed. Save the speed rides and Strava KOM attempts for post-pandemic.
One big change at this time is social distancing. We’re reading about a lot of folks heading out on solo rides. These can be wonderfully therapeutic, and a few simple pieces of kit and know-how can help seal the deal on a safe, happy return home from your ride.
First thing before any ride is a quick bike check. We tend to approach things from front to back. Quickly make sure there are no loose bolts in the stem, front brake and front axle is snug. Air pressure is where it should be. Brakes are functional. No leaks or major frays in cables. Brake pads looking okay.
Then a quick peruse of the middle of the bike. That would be making sure the saddle and seat post are snug and properly adjusted for your comfort. Down low - we want to be sure that the pedals are tight, and spinning well. A jiggle and spin of the cranks to check the bottom bracket health, then move to the back of the bike.
Chain and derailleur should be cleaned and lubed regularly. Shifting in good health, and rear brake functioning properly. Look over the rear brake as you did the front.