I use ATG 714 and the scotch tape that comes with it. I bought it at framingsupplies.com. Well worth the investment.
I also have the little xyron x and the xyron 500. I alwyas use 40% coupons at Ms or ACM or Js for the refills.
Just the past week I got tired of the glue boogies from the xyron so I went to
Walmart and bought all of the scrapbbooking glue they had (no coupons).
I tried the scotch glue sticks $1.44 I think. I was surprised to find that they worked well and I really liked using it. I used it to glue together a bunch of jungle gyms and slides from the locker talk cart - -so the glue did get outside the lines. It did clean up well, easily and dried clear.
I tried the zig two way chisel tip - -I liked that too! I used it for some very thin things -- the swingset from locker talk cut at 2 inches -- liked that too. It dried clear and everything is stuck down.
Both of these items -- I know I would have spent a long time cleaning up glue boogies. THese were for a swap so I had 5 sets of everything.
Last I tried the scocth scrapbooker's g;ue with 2 way applicator. It made the paper curl. Maybe I used too much. I am going to try it with skittles and again with paper but use less.
Last I have the vario tab dispenser, which I used to use beofre I got the ATG. I like it. I use it when I go somewhere and don't want to take the large aATG with me. I get the re-fills at scrapbookpal.com. It seems the ACM & Ms is always out of them.