I assume your not rooted. Either way there are some apps. In the market that will clean your system cache, some free some paid.
Clearing the Cache on your applications might help with a general system slow down.
It can be done without an app by going into your setting < Applications < Manage applications.
You have to select each app one by one and clear their cache, which can take some time. You can also manage your running services in this menu, tuning off things your not using will help free up some system space.
clean cache works well if your not rooted
Cachemate is that way to go if your rooted.
I have a Droid(original). For the past few weeks I have noticed that when I wake up the phone, the home page will take up to 10+ seconds to populate. Not only that but some apps may take as long or longer to open. It is not consistent however, and I can not find a common problem. I have not downloaded any new apps recently, only get them from the market, have deleted a live wall paper that I have had for some time and not running any live wall paper now(did not make any difference)and I do not have a rooted phone. I have updated apps as they have come along but can not remember the problem starting after any particular update. I have 2.2.1
Has anyone else experienced this issue? I am beginning to feel like I am using an old computer whose RAM is insufficient or the hard drive is clogged. Is this what is going to happen with open source programming for Android? Or maybe this has nothing to do with it.