There is a shortcut to benchmark: learn from the person you are most jealous of.
Reasons are as follows:
1. Moderate difficulty. People generally only feel jealousy towards those who are somewhat similar to their own situation, but when the gap is one or two levels higher, it turns into admiration if the disparity is overwhelming.
2. Inner motivation. Jealousy precisely indicates that you want to achieve what they have and feel that you deserve it.
3. Results are measurable. When you no longer feel jealous, it proves that the gap is not significant, and you have already grown. Even if you haven't achieved it, your mindset has improved, which is also a gain.
