Tip #1 for Travelling with Financial restraint : Book your trip far in advance so that you have no choice but to plan around it. Like jumping off of cliff. Just do it. Otherwise it won't happen. That's what I do any ways.
Tip #2 Self Cater- Self Cater- Self Cater. When I travel I will happily spend more on food than accommodation. I'll pitch a tent under a bridge to make up for a grand lunch the next day. Being prepared and willing to self cater as often as you can will seriously cut your costs.
Tip #3 : Go on Long trips. Give your self a good 2 months. That way you can budget, take your time and move slowly and just be where you are instead of packing in expensive and senseless tours and dinners and ultimately missing out on where you are and why you came.