Here's my little tips/tricks...

Bring it to TDC and before you remove the rocker assy, zip tie the cam to the dizzy shaft. That way you won't have to remove the dizzy and reset it and in the mean time it holds the cam in place while you remove the rocker assy.
I have spare rocker shaft/cam journals that are dis-assembled. I put one on each end of the cam to keep it in place. If you don't have spares you can dis-assemble yours temporarily.
After you've got the dummy journals in place, you can cut the zip tie. *keep in mind that all the valves are closed so you don't have to worry about hitting a valve while you turn the motor by hand SLOWLY.
With the motor on TDC you can do #1/#4 valves. The valves will fall a little but the piston will catch them. *stick a screw driver in the spark plug hole just to make sure the piston is actually up, a little insurance goes a long way*.
Next turn the motor 180 degrees and do the #2/#3 valves.

When your done, reverse the order above... *You can do away with the zip tie deal if your going to change the timing belt at the same time. There is also the nylon rope trick, feed about a foot of nylon rope thru the spark plug hole with the piston at half stroke and as it comes up, the rope will bunch up in the chamber and hold the valves up for you.

oh yeah, Pick up one of those mangnetic tool picker upper things. They really help removing stubborn retainer keepers.

If your budget fits, I'd invest in a set of dual/heavy duty valve springs for later if you decide to throw in a bigger cam.

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