Christmas is coming up, and when it's all over and done with it's a great time to shoplift.
Here's just a few (already mentioned in this thread) techniques that are great to use just after xmas time:
*Old skool (take it and go) shoplifting. Watch out for tags.
*Shoe swap - Ask to try on some shoes, then walk out the store wearing your brand new shoes. Again, watch out for tags. If tags are present, either remove them or just give the shoes back and say you'll shop around for the best deal.
*Social engineering - Store employee's aren't thinking straight. They've got a million and one things to keep on top of at christmas time. Other (genuine) customers will be asking questions non-stop. Take advantage of this. I'm sure some social engineering techniques have been discussed earlier on in the thread. Be creative.
*The "I-don't-give-a-fuck" grab 'n' go - Go into a very crowded store and lift as much as you want. Fuck the tags. You don't give a fuck!

When you go out there will be a mass of other customers leaving the store. Trust me, no-ones going to bother searching all of those people to find the culprit.
Planning in advance is key to good shoplifting. Start planning your big lifts now.