In no particular order
1) One of the credential banking things is worth it. It is a weird call on which one to choose. CPQ is better integrated with many jurisdictions, and the psypact whatever. National register is weirdly integrated into some state laws and has "free" CEs on demand. ABPP has some portability in some states and will get you some pay raises in the VA. All of these things will offer you the first year for free. It's not an accomplishment.
2) If you are buying your own malpractice, get cheap stuff your first year. You don't have assets, and you don't need a tail. Upgrade your second year. Pay for the legal assistance. It's a deal.
3) uptodate= worth it. audiodigest=not really.
4) Conference expenses are a business deduction. Unless you have a specific subject that you want to learn about, prioritize based upon where you want to vacation.
5) Snapscan is worth every cent.
6) APA membership can get you discounts on auto insurance. Some insurance companies will give you a discount if you own a single share of stock in their company.
7) Immediately get a Roth IRA, and put something in it. If you make money, those become harder to get.
8) Sci-hub