My approach to weightloss and maintenance differs a bit in regards to weighing.
When I was losing the majority of my weight, I found it more motivating to weigh every week or 2. This happened by chance as I didn't even have a scale so I had use my friend's scale as my weigh-in scale. I was full of motivation and didn't stray and I knew what I was doing was working.
During maintenance and now that I'm trying to lose the weight I've put on the last few months, weighing everyday is a MUST for me. It keeps me accountable, in check, and in tune with my body and it's natural fluctuations. I spent most of my life having no idea what was going on with my body and I find that weighing everyday keeps me more aware