I found the best way to overcome this was to have an account that I could only withdraw cash using a bank book. Pretty old fashioned but you had to go into the bank to get your cash. This makes it harder to get at.

Next I set up standing orders. One to a savings account straight after payday and made equal payments into my visa debit account every week (well nearly equal it paid my rent in with the first lot so I could pay that)

It's a pain to set up but once it's done, it's done you get regular "pocket money" at a budget instead of thinking I'll go all out.