Many people find small, blunt, brush-like objects like back-scratchers and even hairbrushes and combs to be very ticklish, along with small rod-like objects like q-tips and pencils. Be careful with any kind of object that can puncture the skin — never use a sharpened pencil and never poke too hard. These objects work better on lower-body tickling, particularly on soles of feet.
Find a hairbrush with rubbery bristles, the kind with small balls on the tips and that fan outward (scratchy bristles made of horsehair and other materials won’t work as effectively).
Apply baby oil to the soles of the feet and rub the bristles up and down.
Many devoted ticklers find electric toothbrushes to be very effective — for both lower body and upper body tickling. But don’t use your nice toothbrush — the one with a built-in brushing timer and charging dock on your bathroom counter. You don’t want to reuse a toothbrush that’s been used to explore the ticklishness of your partner’s body — unless, you know, you’re into that.
Your tongue is very ticklish, especially in hyper-sensitive areas. Don’t lick — tiny flicks of the tip, broken up with kisses and sucking, is most effective. Try this on the neck and earlobe and your partner may be gasp and convulse like I do.