I also agree with amandalouise. Finding the answers to these questions can only come from inside work and work with your therapist and inpatient treatment.

When I was switching a lot and losing time was a common occurance my system made a group agreement to use sticky notes and leave each other messages. We had them all over the house. It actually got kinda fun over time.

It wasn't a perfect solution, but the important stuff, like turn off the stove, lock up, take out the dog, lock the car, take a shower, go to see the therapist or psych doc actually got done.

This is only my experience. It worked for me and mine. I wish you the best.