Building is not really hard, but it requires patience and common sense.
1) Read the instructions
1a) Did you really read the instructions?
1b) No, really! Not just "looked them over", but really READ and THINK.
2) Measure twice, cut once...
3) A few simple tools are all you need to get started - hobby knife, razor saw, metal straightedge, steel square, pins, assorted sandpaper
4) Measure twice, cut once...
5) Keep your work area as neat as possible
6) Measure twice, cut once...
7) Clamps are some of your best friends. Use them.
8) Did I mention about measuring and cutting?
9) Keep a good sharp blade in your hobby knives
10) 2 x M = 1 x C
You get the idea.
[sm=thumbup.gif]And, yes, absolutely visit Cafeenman's wonderful [link=http://www.airfieldmodels.com]Airfield Models Web site[/link]. Paul's articles on building are better than anything you will find in a magazine or book today.