sometimes when you feel overwhelmed it helps to break a "job" into steps, or segments. for instance, don't feel you have to make 4 calls. tell yourself you choose to make 1 call.

also, for me anyway, i'm at my best in the beginning of the day. my body is in more pain & i'm more tired at the end of the day so more unlikely to get things done.

you might also try doing 1 thing & then resting. then try something else. giving yourself breaks may keep your strength & energy up.

i'm a list kind of person. but, don't put 12 things on it. maybe 3 or 4. i try for that. if i'm getting tired i'm able to stop at 3 & start a new list for tomorrow.

hope any of this helps.