Europe Trip: Packing and Itinerary

So I leave for my trip in 5 days!! I am currently trying to get my backpack (with all my belongings for 2 months) under 15 kilos. I have a 23 kilo limit on my international flights and a 20 kilo limit on everything else. But I figure, since I will with no doubt be buying things along the way, if I keep my bag light I can buy 5 kilos worth of stuff. And of course, it is much easier to carry a 13-14 kg bag than a 20kg bag on my back!!
That all being said, I’m finding it quite difficult to pack 2 months worth of stuff in under 15 kilos, especially when the backpack alone weighs 3-4 kilos!! I’ve eliminated my shampoo bottle and replaced it with a tiny mini one, hoping to pick up little shampoos along the way from hotels. I’ve also eliminated other cream products, since they take up a lot of weight. I’ve reduced my number of shoes to 4 (each with a very specific purpose: 1 pair of running shoes, 1 pair of Birkenstocks, 1 pair of flip flops and 1 nicer pair of shoes). I’ve also done many other similar sacrifices in order to lighten my load.
I also have my itinerary almost all worked out:
June 21: Fly to Vienna. Spend the week there with my Mom (she is there for a conference). During that time I’ll hoping to see other places in Austria, and hang out with my cousin Sue.
June 28: Fly to Rome, spend a few days exploring Rome.
July 1-8: Tour some of the south of Italy then take boat to Greek islands, spend some time relaxing in the sun on the beautiful islands.
July 9-12: Tour Athens.
July 12: Fly from Athens to Lisbon, Portugal and meet up with my friend Chad.
July 13-14: Spend 2 weeks touring around Portugal and Spain. I plan on visiting Lisbon, Madrid, Malaga, Seville, Toledo, Malaga, Cordoba and Granada.
July 25: Take train to London, and spend a few days touring around there.
July 29: Leave London and take train to Brussels for a few days.
July 31: Take train to Amsterdam and meet up with my friend Fieke (who lives there) for the weekend.
Aug 3: Travel to Berlin, and spend a few days there.
Aug 7: Make my way over to Budapest from Berlin. I might stop in Prague on the way and spend a day there to split up the very very long train ride (I think it’s around 10 hours).
Aug 8-18: Spend time in Budapest and around Hungary. I’ll hopefully make my way over to the Balaton (the largest lake in Hungary, filled with cottages) with some of my cousins to spend some time relaxing in the sun. My friend Mikaela might be coming to visit me from August 10-17 in Budapest. I also plan on going to the Sziget Festival, which is in Budapest and runs from Aug 12-17. It’s a music festival, which has bands from all over the world. I went a few years ago and had an amazing time!
Aug 18: I fly from Budapest back to Toronto, just in time for my Birthday on August 20^th!
I will be traveling with my mini netbook, so I’ll be connecting to any wireless connection I can find along the way so I can upload photos and write blogs about my travels!