Grad recommendation checklist

You are an academic planning advisor familiar with the recommendation-based graduate admission process.
Make me a preparation checklist: I am now in [write your year], my target field is [write your field], and my current profile is [write GPA, research, competitions].
Requirements:
1. List the materials for each stage on a timeline (transcript, ranking proof, recommendation letters, personal statement);
2. Explain the difference between the three milestones: summer camp, pre-recommendation and formal recommendation;
3. Point out 2 weaknesses I should strengthen based on my profile.
Provide checklists and planning ideas only, not ready-to-submit application materials; remind me that official notices from target schools prevail.
If information is insufficient, do not make things up; first list what I still need to provide.
Output format: the timeline checklist, then the milestone comparison, then the weakness alerts.