what do you mean with 1?
the snippets fire in their respective scope, so to fire the html snippet you need at least an empty document with the filetype/syntax set to HTML.
then just type html and press tab.
be careful, the sequence h,t,m,l must be typed with no typos, e.g. when you type htlm, delete lm, type ml and press tab, the snippet won't trigger. you do not type the comma!
you can find all snippet shortcuts under tools snippets.
your need to make build scripts yourself, search the forum a bit.
you can download textmate snippts from the macromates repository svn.textmate.org/trunk/Bundles. not all will work out of the box and you will need to change the directory strucutre (no subfolders for example).
take a look at %USER\%APPLICATIONDATA%\Sublime Text\Packages\ to see how its done.
you may want to take a look here sublime.akalias.net/snippets/