I usually consider

• how much I hate doing it
• how long it will take to do vs
• how long it will take to find someone to do it
• how much it will cost. The weight of what is acceptable changes depending on how much I need the money at that time.

Although I agree with you, I believe that if you are in that position, the best approach is to start small. Automate putting a small percentage of your income into a savings account or an index fund if you do not have debts. If you do have debts, automate paying a small amount toward them every month. This way it is out of your mind, and you are less tempted to spend it. This comes from the belief that changing your environment to reduce temptation is the best way to get rid of bad habits.