I just started myself a month or so ago, but learned quickly that less is more when it comes to adhesives. You definately want to use one specificly for scrapbooking, but the type depends on the media you use.
My first 6-8 pages I only used liquid adhesive for everything - and way too liberal an amount. Parts of the pages got a little wrinkly, and even a few pictures.
Then I discovered adhesive mounting squares. They are much cleaner for me, and are very easily hidden under things. I've found Thermo-Web brand mounting squares to work best for me so far. It was about $3 for a roll of 750 squares. I use this for pictures, mattes, etc.
I still use the liquid adhesive for some items (like those MGM Drink Stirrers from MGM, 3-d things like that), but have found the mounting squares to be very easy to work with and they make a very elegant, clean page.
Good luck! I'm sure other more experienced people will give great advice.
NED