Don't worry... just get back on the horse!

The phrase ''to get back on the horse'' means to attempt the same challenging action after failure. It is apparently derived from an old adage: "You have to get back on the horse that threw you."

Or it may as well mean to get back into a habit. Traditionally this would refer to a good habit, but sarcastically might refer to a bad habit or addiction. Possible confusion with the phrase "on the sauce".

Here are some examples:

Def. 1 - I know you burned the turkey trying to cook Thanksgiving dinner, but you can't let that stop you if you really want to become a chef. You'll just have to get back on the horse and try cooking it again.

Def. 2 - I'd been trying to do 30 minutes of exercise every day, but my work schedule eventually got so busy I could never make it to the gym. Things have calmed down quite a bit recently though and I keep meaning to get back on the horse and go work out again.

 

source: urbandictionary.com