Uh.. kinda hard for us to help you out with that when we don't know:
1) Where you live
2) What experience you have
3) Your current job
4) How much jobs in your area pay

Find a nice paying weekend job. Valet, Host at a restaurant, construction. Collect every penny or dime you find. Sell unwanted clothes or items that you no longer find valuable. Spend less on food buy more in bulk or make more with less in the kitchen multiple ways to save money and scrape together if you squeeze all you can out of everything. Hope this helps best of luck to you.

get a part time job

• Look for a better paying job
  
• Ask for a raise/more hours/overtime
  
• Sell some of your unused belongings
  
• Invest in things (Bitcoin, Stocks, etc.)
  
• Sell other things (Trap)
  
• Sell plasma, this is actually good money believe it or not
  
• Buy things cheap and flip them for profit
  
• Make something that advertisements can be run on

UK
I have experience with building sites brick laying etc mechanics for motor vehicles that's what I'm currently doing but I also have experience with gardening
I am currently on £280 a week was on £340 but getting taxed now

Rodent_Modz wrote get a part time job

got a full time job but still not too good pay

Go to school and get a associates degree so your not working a low paying job the rest of your life

Get a second part time job. Sell some things you do not use around the house.

Start applying for better paying jobs it seems like you have some experience in some stuff. Apply around and hustle your a** off to make ends meet. Find another job and work both jobs until you find one good paying job!