How small you break your tasks down is up to you and your current circumstances/state of mind.
Treat the process of breaking down your tasks and sub-tasks as an important first step of the project, which deserves time, care, and attention. This kind of activity is called metacognition, and it is highly valued not only as a way of accommodating a problem with executive function, but enhancing higher order learning. It is a relatively small investment that has big pay-offs.
We have some tools and resources to help with breaking down your project into manageable steps in a logical order. All of these are options - you don't have to do all of them, or do them in any particular order. They're just things that are available if they seem helpful to you. If you can't decide, default to Ask A Librarian.
It helps many people to write notes and lists to themselves. Here are some tools to help with that.
When faculty and advanced graduate students are working on books and dissertations, we recommend that they use a citation manager. These tools require some set-up and you have to go through the steps to use them, but if you struggle with working memory or executive function, front-loading the effort like that will make the later stages of research and writing a lot easier because all the information will be organized and easy to find.
Citation managers are free software apps that integrate with your web browser and your word processing software. (You will need to use the installed version of Microsoft Word or Open Office - you can't use Office 365.)
It saves your data to any computers that you use and to the cloud, and they sync either whenever you come online or whenever you tell it to. It helps you gather all the citation information about each source you use, store, and organize it. You can attach a copy of the pdf if it is an online source. You can also enter your notes on that source. You can keyword search for any source by its author, title, or keywords, and go right to the citation information, full-text, and notes about it.
As you write, you use a tab that the software adds to your word processor to enter a citation. As long as the information you entered into your citation manager was correct, your citation will be correct. If you end up revising and moving paragraphs around, your citations move with the text. If you want to change the citation style from APA to Chicago, or Chicago to MLA, you can do that all at once.
With all that taken care of for you, you can concentrate on what you actually want to learn and what you want to say in your paper.
There are two high quality, full featured free citation managers: Zotero and Mendeley. They are almost identical, but:
Almost all of our websites show you the Basic Search when you log in. This is just one text entry box with a button where you can submit anything from plain keywords to elaborate Boolean strings. It works well enough for most searches, but Advanced Search has a few more features.
If you've got difficulties with attention or memory, the best feature of Advanced Search is that it remembers your previous searches, and lets you run them again, or make changes to them. You only have to type it in correctly once! You don't have to remember what you typed. Just keep going back to your saved search and making iterative changes, which the database will keep track of for you!