How do you navigate these fora?

[Abaddon_ire]

Since I land here nearly every day at least once, "Todays posts" suits me fine. If you are not a daily visitor, "new posts" might be more appropriate. "my posts" gets you the threads you are actually participating in.

I have no idea why this is difficult.

There is no difficulty—I am just curious to know others’ habits here. I have been mostly to fora with very few subcategories so never really had any second thoughts. But “today’s posts” or “new posts” seem like pretty useful shortcuts.

Ah, your question is about habits, OK. For me, clicking "Todays posts" makes sense since I hit this site most days. If one were more intermittent in visits, "new posts" might be more appropriate. 

Fundamentally, how I browse suits me. I have no idea what might suit you. All I can do is advise how different features work.