Customized Search feature in Navbar

[ggiersdorf]

Im sure this is possible but Im having one of those days, can someone please tell me the code or how to create three special search navbar buttons.

#1. Most discussed topics in the last 24 hours.. (basically have it report back on the last 10/20 hottest topics regardless of forum or subform)

#2. All posts that were created regardless of responses in the last 24 hours...

#3. All threads that I have responded to in the last 24 hours (not subscribed threads)

Thanks in advance!