Not many... I occasionally visit the rest of course but those 3 are my main.
Chat, About, Sport (mainly footie), Maths, Entertainment (mainly TV & Film), Imperial
General, Socs, MUN, House of Commons, D&D, Foreign Languages, Oxbridge, About TSR. I sometimes visit D&D, H&R, Chat and the subs forums.
I just use "New Posts" and see which ones interest me from there.
H&R, TV, Fashion, General uni and Sheffield mainly
General Discussion, General Uni Discussion, Ucas etc, Oxbridge, D&D if something actually original comes up.
Socs, HP, academic forums, gaming
H&R(this is when boredom has set in)
About (most likely where this thread should be)
H&R, Investment and Finance, Economics, UCL.
Music, and occasionally this place here and Fashion & Beauty.
chat, GD, subs, entertainment
....and occasionally The Back Room
H&R, University Maths, A level forums, Academic Maths.
General,H&R,Sport(football),Uni talk, Economics,Gap year,Technology
Fashion & beauty