Use simple patterns with few details. Choose loop closures instead of buttonholes. All pattern pieces should be cut singly. For pieces on the fold make a full pattern piece. Choose a nap layout for the pattern pieces and make sure you cut all the pieces in the same direction by marking the back of the fabric with arrows.
Velvet wears better with the nap running up, from hem to collar.
Mark with tailor tacks and silk thread as chalk may disappear. The cut pieces must be well basted with silk thread before sewing. Silk thread will not leave marks when it is removed. Use a Walking Foot to avoid slippage when sewing seams. Loosening the top tension and slightly lengthening the stitch will help to avoid puckering.