A photographer can stick with the same gear for their entire life and still improve on what they do. And there are many ways that you can get better without new gear if you simply just have the motivation. Are you ready?
Dedicate Yourself to a Project, and Give Yourself Deadlines
Pick a Specific Genre and Stick With It

Research More in Your Genre, See How Other Photographers Progressed
Get a Quarterly Portfolio Critique (They Really Work)
Go Network, Surround Yourself With Creatives
Put Your Work On Tumblr/Instagram (And Use Hashtags)
Learn How to Use Light to Your Advantage
Become One With a Single Focal Length
Break the Rule of Thirds
Go Shoot, and Focus on Creating Images That Clients Want to Pay For
Go Through Your Archive and Improve Your Old Images
Get Used to Keywording Your Images So You Can Search For Them Later
Cut Your Portfolio Down to The Type of Work You Want to Put Forward
Work With Other Photographers
Go on Photowalks to Keep Your Reaction Times Up
Improve Your People Skills
Shoot at Least One Photo Every Day With the Intention of Making it the Best
Remember That Photography Doesn’t End With the Camera
Embrace the Power of Cropping an Image
Just Do Something
