Some forum topics that might be helpful:
- How do you decide whether something is “interesting” enough to observe?
- In need of your mentorship & knowledge - coaching new members
- How do you expand your knowledge of different taxa?
- Current or general favorite field guides?
I tend to agree most with those folks who have already suggested observing whatever you already gravitate towards and are most interested in.
I’m not sure how generalists do it, but if you pick one category to focus on, like only plants, only birds, only bugs, etc. it makes it easier to find a book/field guide on just that subject.
Edit: Copied @egordon88’s link from above, good topic too!