List Most Viewed Threads on Forum Home

[jetlej]

I want to have three lists on my forum home page:

1) Most Viewed (in the last xx days) Threads
2) Recently Added w/ at least one reply
3) Recently Added w/ zero replies

Could anyone get me started on the code for this? Thank you so much in advance

I'm going to make it into a tabbed switcher list The idea being that users are thrust into the forum straight away instead of having to delve into categories in order to find something interesting to them.