what the others have said.
i have had some periods of depression myself and it is not nice.
given the current circumstances though you are not alone. there is a lot of things that we all are genuinely worrying about at the moment regarding our health and our friends and families, as well as the country and the economy. sometimes we will all be feeling down and lacking motivation.
what is really good is that you recognise the signs that you are feeling depressed again, and you are looking for ways to help you through this period.
it is also positive that you have been through depression before, so you know that it will end, you will feel better again and you will be ok again.
i have always found it really useful talking to a therapist when things are getting on top of me, or if i am worrying about my mood.
it gets a lot off my chest and also means i'm not putting too much on my wife or friends. its good to have someone to talk to who is not involved with me. just there to support me
another thing that i found really helpful was setting myself REALLY manageable goals.
so for me that might be for example going into the office and doing 5 min work. so walking in, sitting down, and getting straight to work for 5 min, then leaving and getting on. goal achieved! after a week of this and some success, i would think about trying 10 minutes maybe.
for other people, at different stages their goal might be to get dressed in the morning, or just get up and clean your teeth. whatever it is, it needs to be something that you can manage easily. when you are ready to push it a little more do that. find the goal that you can hit, and nail it
hitting the goal, however small, gives you a sense of achievement, and it means you get a little forward momentum. building on this week on week, at a speed you can succeed at will get you on the road to feeling better again.
if you dont achieve the goal, dont beat yourself up. just recognise where you are at the moment, and that things are tough for you. then either revise down the goal, or try tomorrow.
also the samaritans are great if you need someone to talk to and cant get in touch with anyone else, or want to be anonymous.
sending you some positive vibes mate