Sirak, are you doing Jillian's program, or just using the logs?
Horsey, I like online programs for everything but lifting weights. For that, my favorite method is the generic card they have at the gym. I found my old one in my gym bag from my 'power lifting' days (not really, but I trained like one), pre-herniated disc.

Memories!! But anyway - I discovered recently it is really nice to have it right there in front of me. I think it motivates me to do a little more when I see it all there rather than going back home and typing it in.
I discovered this when I would go to work out when tired, and realize when I got home that I had underestimated my last session, and then didn't get in as good of a workout as the previous time. It only took a couple of times to realize that was the problem, and that logging it in live in person was more effective.