I learnt to be less critical of myself - a tool I read about and paid a fortune for in therapy to learn I guess. Takes time and not get it immediately or all the time. The tip I was told was to begin to observe/notice the critical thought I have or bad thoughts or low moods etc but to not comment on them, to not judge myself for them. So say " I know I did not do the washing up, or I recognise I am angry" but not to internalise it, blame myself for not coping etc. am sure others can explain better.
Or to notice I ave bad thoughts, but they are just that - thoughts and that is ok. And with time they will go.
Distraction has been a big tool for recovery for me. Allowing myself time to do things for me.
By reward, initially it was each Fri I get to the end of the week at work I am going to buy a treat - a nice choc bar, or a magazine, or flowers. And if I took sick leave or hol to cope I just started again. Ad tried not to criticise myself.
Rewarding I mean, noticing what I improve on, noticing and saying well done to myself for small victories ( like doing that ironing rather than spending 4 hours in bed all day, or walking to the corner shop). Punishing behaviour for me is usually negative thoughts and being critical or not allowing myself to enjoy the good times. Or sabotaging by not doing the helpful things.
For me ultimately I had to do it myself - which is basically what The NHS told me, that I had all the tools I had to learn them. Cannot say I get it right all the time, but the good days are more common. When I give up and hide in bed it can take weeks to get back into a positive routine. It is balancing doing and rest I struggle with.
Sorry may be totally useless and just my story.
I needed antidepressants to help me start my journey of recovery and had basic NHS counselling etc. and found a good private one but in the end realised I was relying on her and she stopped seeing me as it was be depending on her to do the caring for me I had to do for myself.