jump next previous - tag bookmark or search

[Adam]

My file of code is long and getting longer. So I would like to jump either
forward or backward to the next or previous section start, with a single
keystroke, such as F7 (previous) and F8 (next). 

I would be happy to comment each section start with a signifier-comment,
such as  ;; **    whereas all other comments would start ;;; or ; 

So, which would be more applicable to bind to F7 F8 for this ?  

Tags,  where it would be handy I suppose to collect the comment text on just
that line. 

Bookmarks,  although the need for an individual Bookmark name is
undesirable. 

or a backward or forwards search for ";;** " 

While it would seem the Search method most appropriate, I would be
interested in hearing any thoughts, comments or recommendations.