Migration
The classic mistake with migration is mistaking enthusiasm for progress. In the first few weeks of bullet journaling, doing something with migration every day feels like a clear sign of dedication. Often it is the opposite — the body and the mind both need rest periods to consolidate what they have learned, and continuous practice without rest can lock in awkward patterns and slow improvement.
A pattern that works for many people: three or four short, attentive sessions on migration per week, with full days off in between. Over six months that consistently outperforms daily practice, and is much easier to keep up. If you are about to push harder on migration, consider whether pushing less might work better.
That is the short version. Bullet Journaling rewards patience more than cleverness, and almost all of the visible improvement in the first year comes from showing up regularly rather than from any single decision about gear, method, or collections. Most of what is on this site assumes the same thing: that you intend to keep at it, and that you would rather be quietly competent in two years than dramatically excited for two months.