For me, internet is probably tops, though the occasional filter needs to be employed (e.g. some fora are new world or old world biased as are individuals).
Books offer more relaxation and my collection expands every couple of months or so.
I've all but given up on magazines/periodicals. I find them inconsistent, lightweight, pandering to the wineries and typically just disappointing. I buy the occasional one for a train journey, or in a foreign country.
Wine events have been all too few over the last two years, but hopefully I'll have a bit more time over the coming months and would like to make a couple. Like you, I tend not to learn too much, but sometimes it's an interesting insight into the personality of winemakers who attend (usually good, occasionally bad).
Local retailer? Sadly I seem to be more hooked on the wine hobby than them
There's a few good ones around, where I can ask them to compare and contrast wines and give me some background to a region I'm not too experienced in.
Visiting Wineries: Yes very good, though this is a holiday activity for me and as such has to fight with other attractions
Two others I'll add
Non-Local retailer: Especially those abroad can offer insight into the wines of their region - I've had some genuinely interesting conversations and even learnt stuff while attempting to speak Italian.
Wine friends and local tasting groups: A great source of education, especially in different palate preferences and most significantly in enhancing my descriptors of wine.
Finally, we shouldn't forget what we learn by just drinking the stuff with food, on it's own, with company or on our own. I think sometimes I read too much and don't drink enough!