Consult your owner's manual for specific wheel rotation instructions. Keep them clean to maintain their best performance. Never lubricate the outside of a bearing as it will only attract contaminants. Check the wear on your brake pad each and every time you skate. Make sure the brake is firmly attached.
Brake pads have a wear line which indicates how much life is left in the brake.
Replace your brake pad before this wear line is reached. Eventually the rolling components will wear out and need replacement. Bearing selection should include serviceability, ABEC rating, lubrication, and materials. Every foot is different and may result in fit related problems. These can usually be corrected with additional fit pads or inserts.