Nokia doesn't need my advice but I'm going to give it anyway. :-) !
- Make the existing phones work right. e.g. fix the memory problems with ShoZu and the N95 even if this requires throwing hardware at it e.g. by doubling the RAM.
- Bundle N95s with ShoZu (a version that allows unlimited size video uploads to YouTube, or blip.tv, the present 4MB limit is silly) and a flickr membership and market the N95 for the groundbreaking and cool device that it is (well that I think it is; I don't have an N95 but other than the usual memory problems and the GPS antenna not being sensitive enough it looks like an awesome device)
- recast S60 around an open source core to make it more reliable and robust
- add touch and create a new user interface from the ground up to make the S60 user experience competitive with iPhone.
I am sure Nokia has a response to the iPhone coming soon and I can't wait to see it. Vive la competition! Go Nokia and Apple go!