Matching motifs across the front is much easier than you think and gives very impressive results.
Use the CF marking of your pattern as a guide and cut out single layer (yuck, I know but it's the only way). Go ahead and cut your first side (I always begin with the pattern face down first - that way I always avoid ending up with two of one side) and snip-mark the CF at the top and bottom. Now take this garment section and match it up on the uncut fabric so that the pattern/design matches perfectly. Put a pin at the CF snips at the top and bottom. Now reposition your pattern (face up this time) aligning the CF marking of the pattern with the pins and cut. The motifs will match up perfectly across the front of the garment now and everyone will be impressed.
I also like to match the pocket sometimes: mark the pocket position on the garment section. I like to use some type of see-through tracing material for the pocket pattern piece so that I can roughly trace the pattern/design I am trying to match. You can use gift-wrap tissue, soil separator or whatever else you may have on hand that is kind of sheer. Lay the pocket template over the markings on the garment and roughly trace the motif. Now you can exactly place the pattern piece onto your fabric and get a match.
If you want to match the pattern at the side seams you would do it the same as the fronts, snips would be made at the seamlines. If your fabric is wide enough and the garment is straight at the side seams I would just omit the side seams so that you get a seamless (no pun intended) look without doing a lot of work - however, realize that you may then not be able to match the CF, depending on the pattern repeat.