Most important technique : Use it in well ventilated areas and get a fan to blow the fumes away from your face, or you might develop CA allergy quickly.

For balsa-to-balsa joints, run thin CA ( with a CA tip installed) along the joint line. Don't use too much especially on surfaces that need sanding later. Then run a little medium CA to form a fillet to reinforce the joint. Ca joints are brittle, and the fillet radius reduces the stress concentration.

For ply-to-ply joints, run medium CA, followed by another run with medium or thick CA to form the fillet. For thicker CA, I like to apply some accelerator to quicken the cure. Just lightly soak a swab in accelerator and run it lightly over the joint. You could spray it on, but I find it wasteful.

Make sure that the joints butt together well as this will have impact on the joint strength later. If you have CA islands on surfaces that will be covered, you could sand it away or use a nib file (which doesn't eat the wood away )

Pacer CA works well for me. Good luck !