Resist the urge to weigh yourself everyday! I've found that instead of it encouraging me, it discourages me and it's easier for me to give up.
I sometimes think of the scale as a terrible jokester; one day it says "YOU'RE DOING AWESOME" and then the next, "YOU SUCK" and by seeing the "you suck" weight enough times, you start to believe it and give up.
I personally recommend ONCE a week! When I started losing weight on Jan 2, 2012, I wrote my weight down on the same day every week and kept track the whole year so I could see how AWESOME I was doing/did. Even on the weeks I didn't lose as much, by only weighing once a week, it was easier for me to say, "okay, this wasn't my best week, I'll work harder next week". I also have this awesome calendar that reminds me that I did it once and it's not impossible to lose weight. It also shows me how far I've come and I need to finish what I started.
Water weight, doing a "#2", etc., all of that stuff can be the different between 1 pound and 3. Weighing after you work out is one of the WORST times to weigh yourself and people do it ALL THE TIME. What happens is your during your strength training session, your muscles fibers are tearing up (with proper nutrition, hydration and rest your body rebuilds them for a stronger you). After an intense workout, your blood rushes to the affected muscles to provide them with proper nutrients to recover and clear lactic acid. This is that “pump” effect you feel when you just finished weight lifting because your muscles are inflamed and this is temporary. (http://www.merrittclubs.com/blog/fitness-tips/reasons-why-you-shouldnt-weigh-yourself-every-day)
So once again RESIST weighing everyday so you don't set yourself up for failure. Losing weight (at least for me) is a mental game. If I'm feeling good, then I'm doing good. If I think I can't do it and no matter what I do I'll never get there, I'll go back to doing whatever I want and I really will fail, so BE SUCCESSFUL! Keep a positive attitude and remember you are better today than you were yesterday.