Was just wondering if i should follow a program for a couple monthes to get results and keep a log of the weights/ exercises/ sets/ reps done OR will i still get alot of results if i just go to the gym each time and train the musclegroup of choice with intensity and till failure?
If you are new to this you will see results with anything as long as you are putting out an effort.
My answer to your question is yes, both a routine and a log book should be requirements.
Reasons -
A routine keeps you on track. You should know when you walk in what exercises & weights you are going to do that day. Knowing your routine will keep you moving at a good pace plus a set routine gives you a base to make changes when it is time to mix things up. It will also help you keep the workload balanced. A set routine also helps on days when motivation is low because you already know what you have to get done vs. wondering around trying to find something you feel like doing and then leaving without doing any real work.
If you are serious about being in the gym then you need a log book. You need something to track your progress, something that will show the results of the hard work you have done or show you when you are getting stuck. Log books also help you keep track of your progressions on the weight you are lifting. You also have a record of what weight you have worked at on an exercise when you change your routine up to something new.
