(I don't mention it all the time, but, as a general rule: press everything as you go along!)
Step 1: Find A Good Pattern
Measure yourself accurately & choose the correct pattern size.
Step 2: Pockets I
Sew pocket facings (right side up) to pocket linings (right side up).
Step 3: Pockets II
Understitch the lining.
Press to right side.
Top stitch the fold.
Step 6: Zip Fly I
Turn & press.
Pin & sew onto the Front of your Left-Front pattern piece.
Press & turn to the inside.
Step 7: (* Cutting Down Zip-Strip...)
Snip a bit of the teeth off from where you made the cut.
Open a bit of the end of the zipper, slide on one side & pull it down a little.
Jimmy the other side in & hold on to the tapes you created as you pull the zipper down.
Trim off the excess at both ends.
(Before the zipper is fully attached and sealed in, be VERY careful not to pull the zip head off the end of the zipper - as I have done, many times!)
Step 8: Zip Fly II
Pin & tack the zip (facing out, closed with pull at top!) with the teeth just poking out.
Prepare the zip shield. Sew up 3 sides, turn & press.
Pin & tack over your original tacking (& remove 1st tacking - I use 2 colour threads to make it clearer).
Sew down and remove the tacking stitches.