Nesa, it depends greatly on who you're tickling if you are considered a "good" tickler by that person. Everyone is different in what they like: fingers, nails, soft caresses, digging in, various tools... See what your partner enjoys, but don't be afraid to experiment either. Videos are great, but it is indeed different in person. For example, when I first started, (being the kind person I am) I always stopped too soon, having pity for the lee. Have fun!