(This is shared by my postdoc supervisor: Prof. Alan M. MacEachren.)
One general topic that is relevant for all proposals is that making a clear distinction between Goals and Objectives is very important to successful proposal writing. Here are two useful sets of guidance about that:
1) From a Community College, but clear and concise:
https://www.bpcc.edu/grantsexternalfunding/goalsobjectives.html (pdf)
2) Targeted to NGOs, but also relevant (with a bit more detail):
https://www.fundsforngos.org/featured-articles/frame-goals-objectives-project-proposal/ (pdf)
