I've been very careful to limit social interaction (apart from food shopping once per week for me and elderly family members isolating elsewhere), but I have been out walking for an hour or two most days since lockdown.
I head on foot to secluded woods and fields where I only rarely see people (and give them a wide berth if I do). I don't touch a thing while I'm out, nor sit down or brush against anything. As soon as I get home, I remove my shoes and wash my hands, phone and keys.
Without being goady, I am curious to hear from the most vehement "stay at home" advocates precisely how my daily walk is going to get me (or anyone else) sick, because I literally don't understand where the risk is!