some of these maybe old hat for some but I found a couple i hadn't heard of:
1]Seam allowance....when 2 seams will be joined together, press the seam allowance in opposite directions. This helps distribute the bulk.
2] Feed dogs...if your machine doesn't allow you to drop the feed dogs place/tape a business card over the feed dogs for free motion quilting.
3]Pressing...after pressing piece work allow it to cool for a minute, prevents distortion.
4]Glue Sticks....store in the frig. this keeps them firmer and they will last longer, espically in warmer climates.