More Lizards

Lizards.... great list, great models, great army..... my favourite.
Firstly - with almost any list design/theme you can win (Saurus heavy, skirmish, magic, monsters). You don't need to go with "standard tournament lists".
Secondly, even with new VC's daemons etc Lizards are awesome. If you can't win its your fault - lizards are one of the most capable armies around.

Its difficult to give general advice without knowing what "theme" you want, but there are a few general comments.
1) Slann. Magic doesn't win games, but the Slann can get a VERY good magic phase for relatively few points (try not to be tempted to go too tooled up). With the Slann a Steed of Shadows + Scar Vet on foot is usually the key for getting a strong magic phase. Regardless of the other 3-4 spells you have 1 "must stop" spell per turn (against most armies bane head + rule of buring iron = another must stop spell). More than magic though Ld 9 BSB is awesome in a Lizard list. With average dice you have to lose combat by 4-5 before you need to worry about fleeing - that's HUGE!
2) Skinks. Lizards main strength is the skink. When used properly the Skinks mean that Lizard assault units hardly ever receive a charge - even against faster armies.
3) Tarpit characters. Lizards have access to some of the best tar-pits around. Scar Vets on Cold Ones can absorb HUGE amounts of damage and with good Ld and a BSB nearby can stop knights/chariots monsters etc in their tracks.
4) Kroxigores are awesome..... period. With a BSB (esp Slann BSB) nearby they grind there way through most units with ease.
5) Huanchi Banner is broken. If you use it as 'cheekily' as is possible it can become far too good.
6) Saurus are slow. Lizards are generally fast and agressive - saurus aren't. That said they do create a larger unit does create a nice "anchor". If you want Saurus Heavy I would HIGHLY recommend a Slann.
Enjoy.