how to power the ATMEGA328P-PU

Alright, basically i want to be able to run my ATMEGA off some verboard, and independant of the 'UNO' programming board. basically ive had a look around at various ways of powering the chip, but there seems to be a few ways of doing so and i was wondering what is the most correct way so that i don't fry my chip?

Anyway you want that ends up with 4-5 volts on the atmega power pins. 3 AA alkaline batteries, 4 rechargable AA batteries. Lesser # of batteries and a boost regulator chip. Bigger battery and a 7805 type regulator, or a switching type step-down regulator (check out the selection at pololu.com or the equivalent in whatever part of the world you're in).
3.7VLi battery if running at 8MHz vs 16. What else do you have going on around it?

i know how to power it and all that, its just what goes where, ie the oscilator(s) and frequency, 5v output to where on the chip, resistors and their values, and capacitors.
its going to be hooked up to a few DS18B20's reading the temp at various spots in my pc. and then display it on an LCD

Have you looked at any schematics for any of the arduinos? Make the same connections as what the boards have.

if you mean this one, i have just now, thanks and im only focusing on 'ZIC1' right?

Look at the Promini instead

That's a pretty minimal set of components.
If you use the internal 8MHz oscillator can get by with even less at some reduction in speed accuracy for timed events (browse the forum for discussions on that).
This site has a clone with all the components mounted right on the chip itself! And have seen pics where others have done this without the board. So you don't many parts.
http://www.solarbotics.com/products/kardw
huh - they even have a link to it
http://www.geocities.jp/arduino_diecimila/obaka/project-2/index_en.html

I was playing around with doing the same thing with a '644 chip, more memory, more I/O, 2 serial ports. Would also fit on the 1284 which has 4 serial ports.
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1289437587/all