Try using the "eat the frog method". This method is the equivalent of working earlier on the most difficult tasks rather than keeping it for later. Imagine you had to eat a frog today. Would you hold it off till later or eat it now? If you eat it now then u would have gotten it over with and wont needa think about it for the rest of the day. In contrast if u leave it till later you will be thinking about it the entire day which drains your energy since you will keep reminding yourself that you needa eat it. Same thing with work. If you know you have work to do during the day that's not the most pleasant, doing it in the beginning when you still have all the energy stored is recommended as you are more likely to start compared to when you've held it off till the end when you are already feeling drained. Once energy is drained, starting becomes harder. (Example: Today the plan is to wash the disgusting toilet. Starting right when i wake up will help me get it over with and build momentum to continue with other tasks throughout the day.)