Laughter is the best medicine and often knowing how to make a girl laugh is the key to a successful relationship. Trying to be funny will not win a girl over as fast as just letting your own sense of humor come to the surface. For instance, this review tells you that girls tend to not like guys who are just silly but yet have a comical sense of humor and a positive attitude to go with it.
Also accepting that not everything you do or say is going to be funny to every girl. Learning how to make a girl laugh will be different for each girl. Knowing when to turn the funny on and off is a big lesson to learn as well. There are times when things are not funny and a joke does not need to be made.
Learning how to lighten the mood with laughter is a big key to success. Being able to laugh at yourself over simple mistakes or things that others would pick fun about is also a great way to make a girl laugh. She will see that you are not above cracking a good joke at your own expense.
Laugh with a girl and not at her. Respecting a person for who they are without making them have self-esteem issues is very important. If you are very familiar with the girl and really want to know how to make a girl laugh, try to find out if she likes to be tickled. Personal experience says that this is a very good way to get a laugh. This would not be suggested if you just met the girl, but with a matured relationship this can lead to a lot of fun.
Last but not least, give a girl something to think about when you are not around. Text or email her something funny. Leave her a voice mail in a silly voice or even text a silly joke even if it is something meant for children.