Another way to true a wheel in the frame is to use the brakes to show high spots, this doesnt work with disks of course.

Crank the caliper to one side slightly or remove brake block on one side. Spin the wheel and gradually wind the remaining/nearest brake block towards the rim with the cable adjuster.

Where the rim rubs or stops you have a high spot. Adjust the spokes to remove the high spot and repeat ......

Keep an eye on how the wheel is centred in the frame, It is good to change over sides at some point to keep the rim central.

Also it is well worth investing in one of the cheap chinese spoke tension guages. The one I purchased for less than a tenner is a decent bit of kit. Very useful to check spoke tension is even and to confirm you have actually tightened a spoke rather than just winding it up!