Thanks! I agree with you, of course, but at the same time I think that thinking it will take long leads me to take it easy and think that starting another game is not that bad.
Now I’m concentrating on trying to reduce the number of correspondence games, I’m down to less than 1000 and I’m aiming to go even lower, I don’t know how much yet.
I think that’s the most important thing right now, but I’m still playing a lot of live games (for example 35 today, mostly 9x9 rengos).
I am not trying hard enough, I have to admit it 
.
Thank you for your advice @Jade_9000 (and also @Aumpa , belatedly). In particular, I think counting the number of games I play and trying to force myself not to exceed a certain number is a good idea. I don’t know if I can put it into practice, though.
I can do it, I just have to try harder and stop postponing.