Toyota Repair: 94 camry, camry xle, mile intervals

Question
i'm coming up on 164K on a 94 camry xle v6. i'm trying to figure out what's going to be my next maintenance issues. i'm planning to replace my timing belt and water pump, around 180K, since it was done at 92K by previous owner. is there anything else that i can do as a preventative maintenance?  any other belts i might want to change? should i change the alternator before it fails on me?  should i change the spark plugs w/wires?  the car is running just great.  i just switched to syntactic oil and i drain my trany fluid ever 6k. my gas mileage improved drastically from 20/26 to 25/29 mph. i like to keep the car running in great condition for another year or so.  
any advice on pro active maintenance you can provide, would greatly be appreciated.
thanks.


Answer
When replacing the timing belt and water pump replace the drive belts and also replace any seals under the timing cover that look like they are starting to leak, alternators normally last much longer and don't need to be replaced as a maintenance item, replacing the spark plugs, wires etc is agood idea if they are the original parts.
Actually, the timing belt is recommended to be replaced at 60,000 mile intervals so I wouldn't wait until 180K miles and do it sooner.