Writing a research grant application takes a lot of time and effort. This is why it is very important that you check the guidelines and selection criteria very carefully before you start. If there is a problem, you need to find it at the start, not when you are halfway through.
Here is a short checklist:
1. The right granting scheme. Are you targeting the right research grant scheme for what you wish to propose?
2. The right scientific/technical focus. Is there a good match between the required scientific focus/subject of the research grant scheme and the scientific content and objectives of your planned research project?
3. Meeting all selection criteria. Can you see an effective way of meeting all of the selection criteria, and meeting them really well?
4. Required level of achievements. Do you (and/or the team of PIs) have a sufficiently high level of experience and major achievements for this particular granting scheme?
5. Age/experience limits. Do you meet the requirements or limits on the age of the main applicant(s), and/or the years of experience since gaining a PhD?
6. Institutional support. Do you have the support from your host institution (do they support you putting in an application; will they assist you with the preparation of it; and, if you get it, will there be the right level of support to execute the proposed research project)?
7. Co-applicants. If it is a collaborative proposal, have you verified that your co-Investigators have met this checklist?
8. Previous winners. Finally, have you had a look at previous winners of the grant that you are targeting, and does it look like your application can match that quality?