If you're a pool person, consider skipping a port and staying onboard. You can also get a discount at the spa because it's usually slow in there on port days. Also, if you go for a treatment, tell them (before they start your massage, etc.) that you do not want to buy any products and please do not try to sell you anything at the end. (They will end your treatment early to give you a sales pitch- it's so annoying that any relaxation you gained during the massage, you lose during the sales pitch).