On my first playthrough i probably did the typical beginner mistakes and played almost up to the landsmeet before i found out about the tab key or how I can get back to the camp.
But after knowing of the magic tab key its pretty easy to find all kinds of sidequests that you missed the first time.
Nowadays if I find something new its usually dialogues that i never cared to trigger/select before.
For example I just recentl found out that if you politly decline Morrigans offer to join her tent and then ask her yourself later you get some pretty funny dialogue choices.
You can actually tell her that you want her to come into your tent to hold hands and sing the chant, or tell her that she is evil to which she will agree and request to be disciplined by you.
Much better way to start the whole thing then this boring "tis cold in my tent"