Look at the things you have in your house which may be usable in kink... for example, clothes pegs are very good as cheap nipple clamps (nowhere near as painful as real clamps but good enough for beginners).

For a bit of fun play, I suggest you check out and download Cybermistress (do a search). This is a computer program which acts like a virtual Mistress and gives you a small taste of what it may be like to have a Domme. It can be programmed for different levels of intensity and will decide things like what you wear, when you are allowed to go to the toilet (you have to ask permission), how you eat and so on. There are also various scenarios you can load into this which give you tasks or punishments (for example, one of them is a puppy play scenario which has you wearing a dog lead and drinking out of a bowl and fetching toys). The reason I suggest this is because the tasks on there are all designed to be done alone and so you get a better idea of what can be achieved and what sort of equipment you might need.

True self bondage is very dangerous and you should take great care with it. You need to make sure you always have an 'out' in any self bondage set up (usually a knife within reach that you can use to cut ropes or a spare key to the handcuffs somewhere). Never restrict breathing or put anything around the neck (in face to face bondage a Dom/me may put things round the neck or restrict breathing but they are also there to stop the activity quickly - in self bondage you are hard pressed to release yourself before damage or death may occur).

A common trick in self bondage is to create an ice key. This invovles freezing a handcuff key in a cube of ice which is then put within reach of you wnen you are bound. When the ice melts you can get the key and release yourself but until then you are in bondage. However, it can take a hell of a long time to melt depending on your climate and even a few minutes in bondage is an eternity so be warned of that. My preferred method is to tie the key to the handcuff chain with a shoe lace. This means that you can easily pull the key up and unlock the cuffs.

One thing you may want to try is tying a vibrator to your penis and having it running while bound. You are not allowed to release yourself (barring emergencies) until you have cum (or how about a real challenge - 2 or more times?)