Two main points which should be considered while making a flyer design are it’s attractiveness and a good attention to details. As flyer is a way of marketing your product so while designing a flyer you should keep in mind that all necessary information is present and target reader is able to get the message in a short note or in a few sentences.
Designing a flyer is all about cleverly proportioning colors, fonts, contents etc. If you are still not able to understand then I think you should take a look at below mentioned 10 Most Colorful Flyer Print Designs for your Inspiration. These print examples will definitely give you idea of what I mean and how you should design your eye-catching flyer. It is also a good idea to use affordable online print services like 48 hour print.
Check out 10 Most Colorful Flyer Print Designs from various graphic designers.

10 – Futurecop US Tour Flyer By Akutou-san

Futurecop US Tour Flyer

09 – By Razvan Coste

By Razvan Coste

08 – touch ME flyer BLACC360

touch ME flyer

07 – SBT Skater Flyer by ideareattiva

SBT Skater Flyer

06 – Opiate flyer by loonyworld

Opiate flyer

05 – Expos Bday Flyer by JimMahfood-FoodOne

Expos Bday Flyer

04 – D’n'B party Flyer by BraveDesign

DnB party Flyer

03 – Christmas Party flyer by Rev3ngeR

Christmas Party flyer

02 – Chew The Fat September Flyer by fifties

Chew The Fat September Flyer

01 – All things Russian by ElenaSham

All things Russian