Since version 1.3 its been very laggy for some people...
I found ways to get pass lag
You should at least have 15% of your memory space
Get as far away from spawn point (Usually where the lag occurs)
Have a good Internet connection
- If you have a godly internet connection and like 1 Ping and you lag like crap... blame notch
Do not go near lava or fire
- Stay 40 blocks away from that
-Or put it out
Some people say that one block of fire or one block of lava is laggy
- IT IS TRUE (To my point of view lawlz)
Might also lag if a lot of players are around you
Try to build in flat land
-This is a theory but usally like 128 blocks under a forest or a mountain is usually lava
Well thats it