2. Run (virtual) races for charity. Between the crowded starting lines, profuse sweating, and heavy breathing, it comes as no surprise that most marathons have bitten the dust thanks to Covid-19 concerns. But you can still stretch your legs for a good cause because many of our favorite races, including the 2021 Chevron Houston Marathon and the Aramco Houston Half-Marathon, have gone virtual. Even better? You can do the race on your own time (run wherever you want, whenever you want between Jan. 8 and 17, 2021), fill up on all those endorphins, and do some good because of the marathonâs Run for a Reason program.