do a search for my thread for a 99 ranger XLT w/ a 3.0L auto.
the post will list all the mods I was planning on.
those things you posted will help, each one wont give you much of an increase, but together the total increase in FE would be noticeable.
my goal was to hit 30mpg on my ranger, it just became more important to have a safer family vehicle. now Im going to use most of the same mods on my Xterra, but I dont think I can reach even 30mpg. of course, if I can, I'll do an Irish Jig
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oh, and welcome to the forums