If you are planning on buying a handbags or three, you should certainly sign up for the BAA Worldpoints scheme, the link below gives a 500 BA Miles bonus if you spend over £50:

http://promotions.baaworldpoints.com/bt/

Just write your Worldpoints number down somewhere and double check they add it in when you make any purchase.

Would also recommend having a shower; if it's an early start it can be quite relaxing to shower mid-journey so you're fresh and ready to go the minute you get to your hotel.

I would also recommend taking the Segway rides in the square and there's a nice place a short train ride along the coast where you can go for lunch, called Cascais:

http://www.strawberryworld-lisbon.co...s/cascais.html